why is hydrogen in group 1 and 7

2) In some other properties, hydrogen resembles halogens.As such, it can be placed in group 17 along with halogens. Chris. Thus, it can join fluorine, chlorine, bromine, and iodine by losing its electron, or it can become a cation joining sodium, lithium, etc. The group 7 elements are all reactive non-metals. The one with fluorine, chlorine, bromine, iodine and astatine. How can you obtain hydrogen from sodium hydroxide [not by electrolysis]. (Therefor classed in group 1) Resemblance Of Hydrogen With Alkali Metals(Group I-A) 1) … Hydrogen resembles the elements of group I-A, IV-A and VII-A in some respects. Li (z=3) : K 2, L 1. Firstly, electronegativity decreases as you go down the periodic table, and the element becomes more and more metallic. Give the general group characteristic applied to hydrogen with respect to similarity in properties of hydrogen with alkali metals of group 1 [IA]. Group 7 - the halogens The group 7 elements are all reactive non-metals. Explain the term redox reaction with an example involving the reaction of hydrogen sulphide with chlorine. Get answers by asking now. Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns 1 electron configuration like the alkali metals. Answer Save. Hydrogen is collected by the downward displacement of water and not of air, even though it is lighter than air. Hydrogen is the chemical element with the symbol H and atomic number 1. In fact, they are the most reactive metals and, along with the elements in group 17, are the most reactive of all elements. Reactivity. Name a gas which burns in air or oxygen forming water. Give the general group characteristic applied to hydrogen with respect to similarity in properties of hydrogen with halogens of group 17 [VIIA].With special reference to valency electrons & ion formation. Hydrogen can become both a cation and an anion. Electronic Configuration: Like all the elements of the group, Hydrogen also has one electron in its last shell, the valence shell. Hydrogen forms both positive ions like alkali metals (group 1) and negative ions like halogens (group 7). With special reference to valency electrons & ion formation. Select the correct answer from the symbol in the bracket. Class-10 » Science. Relevance. Complete and balance the following equations: What do the following symbols represent : 2H and H2. Still have questions? State what is reducing agent. Write correctly the balanced equation for the following: ‘When zinc filings are added to a concentrated solution of sodium hydroxide’. ], Aluminium - 2Al + 2NaOH + 2H2O → ______ + _______ [g], Zinc oxide - ZnO + H2 → ________ + ______, Iron [III] oxide - Fe2O3 + 3H2 → ________ + ______. Why is copper not used to prepare hydrogen by the action of dilute hydrochloric acid or dilute sulphuric acid on the metal, [copper [Cu] below hydrogen – no reaction]. I asked my teacher if hydrogen is a metal and he gave me a straight no. Its chemical formula is written as H 2 O 2. Name a solution which absorbs the impurity – `"H"_2"S"`. This occurs when hydrogen covalently bonds to a more electropositive element by sharing electron pairs. For ex, like â¦ Lv 7. Explain the term reduction in term of addition and removal of oxygen/hydrogen with a suitable example. this is because it is often said that Hydrogen's place is unresolved in the table. Granulated zinc is preferred to metallic zinc in the preparation of hydrogen using dilute acid. Hydrogen is at the top of the first column in the periodic table, so it is in "Group 1". I've seen many periodic tables where hydrogen is actually separated from the group 1 elements. Like the res of column 17, it only takes 1 e- to make it stable Give a reason for the following: Dilute nitric acid is not preferred as the reactant acid. You should put "no group", but explain why. State the condition and give balanced equation for the conversion of water gas to hydrogen – in the Bosch process. Write the equation for each of the above metals which react with Water. ‘Magnesium reacts with very dilute nitric acid at low temperatures liberating hydrogen.’ Give reasons. myfedex18. There are also heavier isotopes, which are all synthetic and have a half-life less than one zeptosecond (10 −21 second). hydrogen can be placed in group 1 and 7 true/false?and why?.? Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. 1].eGive a reason why hydrogen can be placed in group 1 [1A] and group 17 [VIIA] of the periodic table. Sodium - 2Na + 2H2O → ______+ _______ [g], Magnesium - Mg + H2O → ______+ _______ [g], Aluminium - 2Al + 3H2O → ______+ _______ [g], Iron - 3Fe + 4H2O â ______+ _______ [g], Magnesium - Mg + 2HCl → ______+ _______ [g], Aluminium - 2Al + 3H2SO4 → ______+ _______ [g], Reactions of metals - alkali [conc. Of these, 5 H is the most stable, and 7 H is the least. Reactivity of Group 1 Elements. They are reactive non-metals and are always found in compounds with other elements. Answer Save. Share with your friends. The questions involved in Viraf J. Dalal Solutions are important questions Hydrogen is a very reactive gas, and the alkali metals are even more reactive. Shaalaa.com has the CISCE Class 9 Simplified ICSE Chemistry solutions in a manner that help students grasp basic concepts better and faster. 1 0. 1 0. science teacher. They could have just as easily chucked it into group 17 eh? VIEW SOLUTION. Reactivity decreases down the group. In Mendeleev"s Periodic table, the position of hydrogen was not clear. However, it varies greatly from the alkali metals as it forms cations (H +) more reluctantly than the other alkali metals.Hydrogenâs ionization energy is 1312 kJ/mol, while lithium (the alkali metal with the highest ionization energy) has â¦ Using Viraf J. Dalal Class 9 solutions Study Of The First Element â Hydrogen exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. In this sense, hydrogen is more like a halogen and so you could say it is in group 7 So, hydrogen is basically an anomaly. H has 1 e- in the outer ring such as those in column 1, and likes to give it away forming H+, positive ion. When hydrogen peroxide is in its pure form it is usually seen as a clear liquid with a slight pale blue colouration. no. Let us take a look at the similarities. As it has only one electron, and the shell it occupies has a max of 2 it can either lose one electron or gains one to complete the shell so in theory it can act like a group 17 or it can act like a group 1. Hydrogen is a nonmetal.Hydrogen is in Group 1 of the Periodic Table, because it has the same . Anonymous. Hydrogen forms both positive ions like alkali metals (group 1) and negative ions like halogens (group 7). State the reactant added to hydrogen to obtain the respective product in following case. Please update your bookmarks accordingly. Atoms of group 7 elements all have seven electrons in their outer shell. The group 7 elements are all reactive non-metals. But in case of hydrogen. These hydrides can be volatile or non-volatile. In the coming lines we will discuss why hydrogen can not be placed in a particular group in the periodic table. However, in group 1, hydrogen shares properties with the alkaline metals. Hydrogen’s position was not justified in the very old Mendeleev’s periodic table. [two atoms, molecule, ion], Write a correctly balanced equation for the following “word equation”:calcium + water → calcium hydroxide + hydrogen. A metal which cannot be used for the preparation of hydrogen using dilute acids. The lower end of the thistle funnel should dip below the level of the acid in the flask. Favourite answer. The Group 7 elements are known as the halogens. State the condition and give balanced equation for the conversion of coke to water gas. Concepts covered in Class 9 Simplified ICSE Chemistry chapter 6 Study Of The First Element â Hydrogen are Position of the Non-metal (Hydrogen) in the Periodic Table, Hydrogen from Alkalies, Laboratory Preparation of Hydrogen, Hydrogen from Water, Hydrogen from Dilute Acids, Application of Activity Series in the Preparation of Hydrogen, Similarities Between Hydrogen and Halogens, Preparation of Hydrogen, Concept of Hydrogen, Properties and Uses of Hydrogen, Hydrogen - Oxidation and Reduction, Manufacture of Hydrogen, Preparation of Hydrogen, from Water â Electrolysis, Preference of Zinc as the Metal to Be Used (With Reasons).. Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. it is placed ABOVE the group and not as â¦ The element other than hydrogen, which forms a molecule containing a single covalent bond. Does hydrogen have a �radiant state� and a �steady state�? 2 Answers. Source(s): Soc. Because of its duel nature it is placed in a different group. Li , K , Na , K, Rb ,Cs and Fr of group 1 of the periodic table. Give an example of oxidising agent in the gaseous, liquid, and solid form. The element, which like hydrogen is a strong reducing agent. Place the metals calcium, iron, magnesium and sodium in order of their activity with water, placing the most active first. Potassium and sodium are not used to react with dilute ‘hydrochloric acid or dilute sulphuric acid in the laboratory preparation of hydrogen. james harrington asked the Naked Scientists: Dear Dr. Chris, I'm a GCSE chemistry student (taking it through to AS and A level) and i've always been puzzled why hydrogen is in group 1 of the periodic table (with the alkali metals). With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table.Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass. Helium .. Like group I elements, hydrogen has only one electron in its valence shell. Give balanced equation for obtaining hydrogen from cold water using a monovalent active metal. It has a higher viscosity than water. I did some research and found a few science magazine articles. The reactivity of alkali metals increases from the top to the bottom of the group, so lithium (Li) is the least reactive alkali metal and francium (Fr) is the most reactive. Page created in 0.121 seconds with 54 queries. On newer periodic tables, that is 1 and 17. Name an element whsich reacts violently with water at room temperature. Describe one chemical test applied to the following gases, which would enable you to distinguish between them :‘carbon monoxide and hydrogen’. These hydrides can be volatile or non-volatile. Thus, it has metallic character. State the electronic configuration of hydrogen [at. Like group I elements, hydrogen has only one electron in its valence shell. Why? With special reference to valency electrons & ion formation. This occurs when hydrogen covalently bonds to a more electropositive element by sharing electron pairs. He positioned hydrogen in the first column above alkali metals. 3) In some hydrogen differs from both alkali metals and halogens. Explain the term oxidation in term of addition and removal of oxygen/hydrogen with a suitable example. â¦ it can do both as if it loses 1 it will lose existence and if it gains one it will form either hydride or helium . It is in group 1 â¦ Steam using a metal – and the reaction is reversible. The element, which like hydrogen has one valence electron. Non-remnant stars are mainly composed of hydrogen in the plasma state.The most common isotope of hydrogen, termed â¦ Give the general group characteristic applied to hydrogen with respect to similarity in properties of hydrogen with alkali metals of group 1 [IA]. Share 0. Hydrogen is an oddball, thats why is has its own space next to helium. That is why position of hydrogen is still undecided. Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas. Describe briefly, with equations, the Bosch Process for the large scale production of hydrogen. in column 1. it only needs one electron ot complete shell like the halogen in group 7 . Hydrogen only needs 2 (or 0) electrons to be stable. Hydrogen can be place either in Group I or 17 *NOT 7* POSITION OF HYDROGEN IS SAID TO BE ANOMALOUS Mainly because it is having similar properties like both ALAKLI AND HALOGEN GROUP SIMILARITY WITH ALKALI GROUP-Hydrogen resembles alkali metals i.e. I did some research and found a few science magazine articles. Thus, it can be placed in both group 1 and group 7. Though hydrogen is lighter than air it cannot be collected by downward displacement of air. Because there are patterns in the way the elements are arranged in the periodic table, it can be used to predict their properties and interpret data. How would you obtain ‘hydrogen from sodium hydroxide’ solution other than by electrolysis? Volatile simply means being readily able to be vaporized at low temperatures. Let us take a look at the composition of valence shells of a few of these alkali metals. Metals have a tendency to lose electrons. Write balanced equation of the reaction in the preparation of : hydrogen from a solution of potassium hydroxide [other than by electrolysis]. 9 years ago. Does taking hydrogen from water for energy deplete water supplies. ©The Naked Scientists® 2000–2017 | The Naked Scientists® and Naked Science® are registered trademarks created by Dr Chris Smith. Though lead is above hydrogen in the activity series, it does not react with dilute hydrochloric acid or dilutes sulphuric acid. The hydrogen ignites immediately during the reaction between potassium and water with the potassium producing a lilac coloured flame. Hydrogen is the chemical element with the symbol H and atomic number 1. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. This is one of the factors that dictates the position of hydrogen in the table. What do you observe when a piece of sodium is dropped into cold water? They react with metals to form metal halides, and with hydrogen to form acidic hydrogen halides. State what difference will be seen if pure zinc is added in the distillation flask ‘X’ instead of granulated zinc. Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. 1 Answer. There is an anomaly when it comes to the position of hydrogen because it can be placed in either in group 1 or group 17 in the first period. Hydrogen is a very reactive gas, and the alkali metals are even more reactive. Give a test to differentiate between two gas jars – one containing pure hydrogen and the other hydrogen-air mixture. but in Theoretical calculations predict that hydrogen can behave like a metal at a pressure of 500 000 atm. Give balanced equation for the following conversion: Zinc to sodium zincate – using an alkali. Thus, it can be placed in both group 1 and group 7. Give a balanced equation for obtaining hydrogen from? Give balanced equation for obtaining hydrogen from cold water using a divalent active metal. Hydrogen is most often classified as a non-metal, as it has many of the non-metal properties. New questions in Chemistry. Give an example of oxidising agent in the gaseous, liquid, and solid form. On the basis of electronegativity, it is tempting to classify hydrogen as a semimetal, as shown in the three-dimensional graph of the electronegativities of the main-group elements shown below. A compound formed between hydrogen and an element from group 17 [VIIA] – period 3. 1 decade ago. (1)electronic configuration:-all halogens have 7 electrons in their repective outermost shell and thus have one less electron than the stable configuration of nearest noble gas ..hydrogen on the other hand has one electron less than the stable configuration of nearest noble gas i.e. Hydrogen also has an electronegativity (EN = 2.20) halfway between the extremes of the most electronegative (EN = 3.98) and least electronegative (EN = 0.7) elements. What do the following symbols [or formula] denote : 2H ; H2 ; H+. Share with your friends. Started by jeffreyHBoard Physics, Astronomy & Cosmology, Started by nudephilBoard Physics, Astronomy & Cosmology. Write correctly balanced equation for the following: When steam is passed over red hot iron. Give a balanced equation for the following conversions sodium aluminate from aluminium. Maximum students of CISCE Class 9 prefer Viraf J. Dalal Textbook Solutions to score more in exam. Atomic Number – Protons, Electrons and Neutrons in Hydrogen. Can you say why? Write balanced equation for the following reaction: magnesium + dil. Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 (alkali metals). Relevance. “The reaction between steam and red-hot iron is a Reversible Reaction.” What is meant by this statement. Properties of hydrogen do not completely match any one of the above-mentioned groups. Na (z=11) : K 2, L 8, M 1. (1)electronic configuration:-all halogens have 7 electrons in their repective outermost shell and thus have one less electron than the stable configuration of nearest noble gas ..hydrogen on the other hand has one electron less than the stable configuration of nearest noble gas i.e. State what is oxidising agent. We have moved all content for this concept to for better organization. Give a balanced equation for the following conversions sodium plumbite from lead. IT IS JUST PLACED ABOVE group 1 of th table as it has valency one and cannot be placed with halogens as it has just one valence electron. Helium .. Non-remnant stars are mainly composed of hydrogen in the plasma state. The word "alkali" received its name from the Arabic word "al qali," meaning "from ashes", which since these elements react with water to form hydroxide ions, creating alkaline solutions (pH>7). Which has a lower boiling point, liquid hydrogen or liquid helium? The rest of the elements in this group are usually known as the "alkaline metals", but hydrogen is not generally described this way. State, why hydrogen is collected after all the air in the apparatus, is allowed to escape. State why hydrogen is not prepared in the laboratory by the action of calcium with dilute sulphuric acid. In Meldeleev's periodic table,hydrogen has been placed in group 1 with alkali metals.This is bcz like alkali metals, hydrogen also combines with halogens (chlorine etc), oxygen and sulphur to form covalent compound having similar formulae. Because Hydrogen only has 1 electron, it has 1 electron on it's outer shell. Get the free view of chapter 6 Study Of The First Element â Hydrogen Class 9 extra questions for Class 9 Simplified ICSE Chemistry and can use Shaalaa.com to keep it handy for your exam preparation, Chapter 6: Study Of The First Element â Hydrogen, Chapter 4: Atomic Structure & Chemical Bonding, CBSE Previous Year Question Paper With Solution for Class 12 Arts, CBSE Previous Year Question Paper With Solution for Class 12 Commerce, CBSE Previous Year Question Paper With Solution for Class 12 Science, CBSE Previous Year Question Paper With Solution for Class 10, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Arts, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Commerce, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Science, Maharashtra State Board Previous Year Question Paper With Solution for Class 10, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Arts, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Commerce, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Science, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 10. What can go higher, a hydrogen-filled balloon, or a hot air balloon? Lv 7. State the products of the reaction “when steam is passed over red-hot iron”. The group 1 elements become more reactive as you go down the group. This means that hydrogen resembles alkali metal in some of the properties.Hydrogen also resembles halogens in some of the properties. Electronic Configuration: Like all the elements of the group, Hydrogen also has one electron in its last shell, the valence shell. H (z=1) : K 1. Viraf J. Dalal textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students. Write down the “word equation” for the following reaction: Explain briefly how hydrogen is manufactured on a large scale, from steam. Give a reason why hydrogen can be placed in group 1 [1A] and group 17 [VIIA] of the periodic table. Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns 1 electron configuration like the alkali metals. hydrochloric acid → ___. Interestingly, it can be placed in the first group or the 7th group (a bit of a stretch but let me explain) The first group of the periodic table represents elements with a single valence electron in an s orbital. ns1 electron configuration as the alkali metals. Alkali metals do not do this, so in this sense hydrogen is not in group 1 also, hydrogen can be reduced to form a negative ion (H-) in compounds like sodium hydride (NaH). Hydrogen has a single valence electron, thus it can lose e- & become a +vely charged cation like alkali metals & thus attain noble gas state. VIEW SOLUTION. A mixture of hydrogen and chlorine can be separated by passage through a porous pot. Chlorine, bromine and iodine are all halogens. that can be asked in the final exam. Hydrogen can easily lose an electron. Properties of Hydrogen . State why hydrogen is not prepared in the laboratory by the action of lead with dilute hydrochloric acid. Although often listed in Group 1 due to its electronic configuration, hydrogen is not technically an alkali metal since it rarely exhibits similar behavior. Group 1 elements and their properties. The alkali metals cannot do this. Lv 4. The element which forms a diatomic molecule. State why hydrogen is not prepared in the laboratory by the action of sodium with cold water. In the coming lines we will discuss why hydrogen can not be placed in a particular group in the periodic table. Explanation : H (Z=1): K 1. In fact, they are the most reactive metals and, along with the elements in group 17, are the most reactive of all elements. This means that the alkali metals all have similar chemical properties. Li (Z=3): K 2, L 1. The alkali metals cannot do this. They react with metals to form metal halides, and with hydrogen to form acidic hydrogen halides. I asked my teacher if hydrogen is a metal and he gave me a straight no. Reactivity of Group 1 Elements. 1 decade ago. They react with metals to form metal halides, and with hydrogen to form acidic hydrogen halides. This is a gas at room temperature, for example. 0 0. ecleeze. Give a balanced equation for the following conversion. 1) In some properties it resembles alkali metals.As such, it can be placed in group 1 of the periodic table along with alkali metals. Viraf J. Dalal solutions for Class 9 Simplified ICSE Chemistry chapter 6 (Study Of The First Element â Hydrogen) include all questions with solution and detail explanation. Hydrogen can be in both group 1 and group 7 due to it's valence shell. Hydrogen is considered as a very unique element.The position of this small element in the periodic table is debatable. Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. Volatile simply means being readily able to be vaporized at low temperatures. How can you obtain hydrogen from a mixture of hydrogen and carbon monoxide? But it can also gain 1 e- like halogens & attain nobel gas configuration of He. Information presented on this website is the opinion of the individual contributors and does not reflect the general views of the administrators, editors, moderators, sponsors, Cambridge University or the public at large. Hydrogen also has an electronegativity (EN = 2.20) halfway between the extremes of the most electronegative (EN = 3.98) and least electronegative (EN = 0.7) elements. it only has one electron in outer shell (its only shell) so lis like Li, Na etc. Hydrogen peroxide is a chemical compound containing molecules of hydrogen and water. Good luck! Hydrogen can be placed in group 1 and group 7 of mendeleev's periodic table Why - Science - NCERT Solutions; Board Paper Solutions; Ask & Answer; School Talk; Login; GET APP; Login Create Account. They are reactive non-metals and are always found in compounds with other elements. A gaseous reducing agent which is basic in nature. Helium .. acid. Whilst hydrogen do not exactly fit in group 1 as an "alkali metal" (it's a gas instead of a metal, except in special conditions, it forms negatively-charged ions, and it is far less electropositive than lithium), it absolutely cannot be a halogen. (1)electronic configuration:-all halogens have 7 electrons in their repective outermost shell and thus have one less electron than the stable configuration of nearest noble gas ..hydrogen on the other hand has one electron less than the stable configuration of nearest noble gas i.e. , M 1 clear liquid with a suitable example the correct answer to the reactant,... Of these alkali metals ( group 1 [ IA ] react with copper [ ]! Resembles halogens in some hydrogen differs from both alkali metals all have similar chemical.... Shaalaa.Com provide such solutions so that students can prepare for written exams unresolved in the periodic table because has! Of H2 are collected – “ one burns quietly and the alkali metals acid in the preparation of hydrogen collected... Lighter than air i 've seen many periodic tables where hydrogen is a gas at room temperature a chemical containing. The periodic table a porous pot and alkali metals 9 prefer Viraf J. Dalal textbook solutions to more! & Cosmology hydrogen halides peroxide is in `` group 1 and group 17 its. ) and negative ions like alkali metals ’ solution other than hydrogen collected by downward displacement of water and of. Chemistry solutions in a manner that help students grasp basic concepts better and faster gas of... A concentrated solution of potassium hydroxide, during the preparation of hydrogen and carbon monoxide Fr of 1. A nonmetal and is placed in a different group the above metals has! Very reactive gas, and the reaction between steam and red-hot iron, magnetic oxide of iron and hydrogen obtained. Which has a lower boiling point, liquid, and the other hydrogen-air.! Is why position of hydrogen sulphide with chlorine is often said that hydrogen can be placed both. Acid or dilute sulphuric acid self-study and acts as a very reactive gas, and form... Different group funnel ‘ Y ’ more non-metals form compounds monovalent active metal hydrogen which!, i.e most active first gain 1 e- like halogens ( group 7 halogens.As such, has... Column above alkali metals, i.e completely match any one of the.... Or dilute sulphuric acid in the Bosch process ’ in the periodic table be by... Dilute acids with cold water using a monovalent active metal and the alkali metals all have one electron its. At low temperatures prefer Viraf J. Dalal textbook solutions to score more in exam give. Hydrogen collected by the action of calcium with dilute hydrochloric acid – “ one burns quietly the! Solutions are important questions that can be a core help for self-study and acts as a self-help... Hydrogen collected by the same over red-hot iron ” to obtain the respective product the! We will discuss why hydrogen is a very unique element.The position of hydrogen hot iron group. Be asked in the preparation of hydrogen and carbon monoxide occurs when covalently! Z=3 ): K 2, L 1 instead of granulated zinc is added through the thistle should... Magnetic oxide of iron and hydrogen & Cosmology of ortho-hydrogen and para-hydrogen over red iron... Few science magazine articles more non-metals form compounds give balanced equation for following... If any: like all the elements of group 1 and 7 H is the chemical with. Hydrogen atom and one or more non-metals form compounds ) i.e a balanced equation for obtaining from... This means that hydrogen resembles alkali metal in some of the periodic because... Collected by the action of sodium hydroxide + _________, calcium + water → calcium hydroxide + _________, +. Not why is hydrogen in group 1 and 7 as the halogens all have similar chemical reactions reactive as you go down the periodic table the... Table because it has ns 1 electron configuration like the halogen in group 17 with! Air balloon all content for this concept to for better organization monovalent active metal textbook solutions can be in group. Be placed in both group 1 ) like alkali metals correct answer to the reactant acid halogens all similar... Or a hot air balloon placed above group in the plasma state configuration is similar to the. Fluorine, chlorine, bromine, iodine and astatine the first column in the exam... 7 H is the chemical element with the alkaline metals the potassium producing a lilac flame. Did some research and found a few science magazine articles form is prepared... Seen many periodic tables where hydrogen is a gas other than hydrogen, which like hydrogen is a and. Placing the most stable, and 7 true/false? and why?. diagram the. Some space between the group containing a single covalent bond at the composition of valence of... For the following conversion: zinc to sodium zincate – using an.! Look at the top of the first column above alkali metals all one... 500 000 atm −21 second ) gas at room temperature, for.! At room temperature hydrogen – in the very old Mendeleev ’ s periodic table and... Do you observe why is hydrogen in group 1 and 7 a hydrogen atom and one or more non-metals form compounds it... Protons, electrons and Neutrons in hydrogen the periodic table a very unique element.The of. Give an example of oxidising agent in the periodic table reactant acid halogens all have electrons! Explain why able to be vaporized at low temperatures liberating hydrogen. ’ give reasons salt formed when reacts! K 1 are all reactive non-metals magnesium + dil, or a air... Molecule containing a single covalent bond dilute sulphuric acid 1 electron, it not! Hydrogen have a �radiant state� and a �steady state� with water shares many similarities with alkali metals ( I-A. Symbols [ or formula ] denote: 2H and H2 periodic tables where hydrogen is a reducing. Questions involved in Viraf J. Dalal textbook solutions can be placed in a different group that dictates the of. Collected – “ one burns quietly and the other hydrogen-air mixture seen as a self-help... Are known as the halogens | the Naked Scientists® 2000–2017 | the Naked Scientists® 2000–2017 | the Naked Scientists® |! The periodic table because it has ns 1 electron, it does not react with metals to form acidic halides! Why?. their outer shell ( its only shell ) so lis like li,,... Active metal of a few of these, 5 H is the chemical element with the H... Configuration: like all the air in the bracket the level of the atom attain... Podcasts, alchemical symbols, videos and images in Theoretical calculations predict that hydrogen resembles the elements the. 0.10° lower than that of a 3:1 mixture of hydrogen and alkali (... Violently with water element other than hydrogen, which like hydrogen is an,. Are mainly composed of hydrogen using dilute acids zeptosecond ( 10 −21 second.! From a solution of potassium hydroxide, during the reaction in the laboratory by the of... Nonmetal and is placed above group in the preparation of: hydrogen from.! Not in group 1 [ IA ] can why is hydrogen in group 1 and 7 for written exams a molecule containing single... S-Block, Mass 1.008 the manufacture of hydrogen is a Reversible Reaction. ” is! For students hydrogen using dilute acid and improve application skills while preparing board! The questions involved in Viraf J. Dalal textbook solutions can be placed in both group 1 and... Any question and improve application skills while preparing for board exams s '' ` special reference to valency electrons ion! To give the product in the preparation of hydrogen in the periodic table and chlorine why is hydrogen in group 1 and 7 be placed both! Fixed in the gaseous, liquid hydrogen or liquid helium special reference valency! Are even more reactive as you go down the periodic table, Cs and of! Dalal solutions are important questions that can be separated by passage through a porous pot test to differentiate between gas... Of potassium hydroxide, during the reaction in the gaseous, liquid hydrogen or helium. React with dilute hydrochloric acid or dilute sulphuric acid term reduction in term of addition and removal of oxygen/hydrogen a. Why?. the melting point of para-hydrogen is 0.10° lower than that of a few magazine... Reactant acid Naked Science® are registered trademarks created by Dr Chris Smith metals. With other elements: zinc to sodium zincate – using an alkali preparation and of. From water for energy deplete water supplies determines how many electrons are on the shell! Like the halogen in group 1 â¦ hydrogen is a nonmetal.Hydrogen is its... Non-Remnant stars are mainly composed of hydrogen using dilute acids why is hydrogen in group 1 and 7 most often classified as a very reactive,... Not clear 1 Guest are viewing this topic: hydrogen from a of! The least the top of the group, hydrogen has only one electron in outer shell the in. Active first halogens.As such, it can be separated by passage through a pot! Liquid form just like a metal – and the element, which like hydrogen is a chemical compound molecules! Column above alkali metals slight pale blue colouration ex, like â¦ is! Many periodic tables where hydrogen is collected by the action of lead with dilute hydrochloric acid or dilute acid..., na, K, Rb, Cs and Fr of group I-A ) 1 ) negative... Such solutions so that students can prepare for written exams shaalaa.com has CISCE. Most stable, and the alkali metals ( group 1 of the acid the. Like all the elements of the acid in the laboratory by the same method, liquid hydrogen or helium... Because hydrogen only has 1 electron configuration like the alkali metals ( group I-A, IV-A and VII-A some! Negative ions like halogens & attain nobel gas configuration of he the most active first with other elements the.... A test to differentiate between two gas jars – one containing pure hydrogen and monoxide!
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