group 7 element) or give one away (like a group 1 element). Li (Z=3): K 2, L 1 2.2 Answer any five questions 1. Hydrogen shares many similarities with alkali metals, i.e. Entertainment News - Find latest Entertainment News and Celebrity Gossips today from the most popular industry Bollywood and Hollywood. Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. Why hydrogen can be in group 1 and also can be in group 7? There’s a bit of merit in classifying H as a halogen, but not a lot. Share 0. This characteristic of hydrogen matches those of alkali metals. They react with metals to form metal halides, and with hydrogen to form acidic hydrogen halides. But they hydrogen atoms can also gain one electron similar to halogens. The wrong placing of the element Hydrogen in the periodic table. 1 s 1 ). resempblence with halogens (Group -17 or Group VII)--- (1)electronic configuration:-all halogens have 7 electrons in their repective outermost shell … The Group 7 elements are known as the halogens. Give the general group characteristic applied to hydrogen with respect to similarity in properties of hydrogen with alkali metals of group 1 [IA]. Thus, it can join fluorine, chlorine, bromine, and iodine by losing its electron, or it can become a cation joining sodium, lithium, etc. VIEW SOLUTION. In fact H does not form H+ ions except in the presence of a strong electron pair donor like H2O or NH3 and "naked" hydrogen ions are less likely to form than hydride ions H-. • Hydrogen element has been placed at the top of group 1, ... Hydrogen forms similar compounds as Group 1 elements. These s-block elements are found in Group 1 and Group 2 of the periodic table and are the most active metals. Log in. Resemblance Of Hydrogen With Alkali Metals(Group I-A) 1) Like alkali metals hydrogen has one electron in its valency shell. 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).The alkali metals cannot do this. (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. Another way to prevent getting this page in the future is to use Privacy Pass. View the latest business news about the world’s top companies, and explore articles on global markets, finance, tech, and the innovations driving us forward. 1. The modern periodic table does not show hydrogen in Group 1. Relevance. Hydrogen is placed in group I of the modern periodic table due to following reasons:- ( 1 ) It shows outer electronic configuration similar to group I elements (i.e. Hydrogen also resembles halogens in many ways. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. How old was queen elizabeth 2 when she became queen? From the top to the bottom of group 1, the elements have heavier, more reactive atoms. They react with metals to form metal halides, and with hydrogen to form acidic hydrogen halides. What is exact weight of male Bengal tiger? Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. Hydrogen is considered to be in a group of its own. Thus, it can be placed in both group 1 and group 7. Your IP: 217.182.169.93 Properties of Hydrogen . 2 Answers. Anonymous. But some, like the one I was given, also show Hydrogen in the 7th group, to left of Helium. Log in. The Group 7 elements are known as the halogens. Hydrogen can be placed in group 1 and group 7 of periodic table Why - Chemistry - TopperLearning.com | 5pvnskvnn Give a reason why hydrogen can be placed in group 1 [1A] and group 17 [VIIA] of the periodic table. Why? hi.. well hydrogen IS NOT in group 1 of the periodic table.. Why? myfedex18. well, hydrogen can form covalent bonds (eg in water, methane etc). Yes it can be placed in either of the groups.-----This is because, Hydrogen has only 1 valence electron in its outermost shell.Like the Group I Alkali metals it has valency = 1 i.e it can lose electron. Astatine is placed below iodine in group 7. They are reactive non-metals and are always found in compounds with other elements. 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 date do new members of congress take office? Like group I elements, hydrogen has only one electron in its valence shell. please remember ther is some space between the group 1A and Hydrogen. It can get rid of one electron to attain noble gas configuration. What was lasik visons competitive priority? it only has one electron in outer shell (its only shell) so lis like Li, Na etc. The group 7 elements are all reactive non-metals. 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. In the coming lines we will discuss why hydrogen can not be placed in a particular group in the periodic table. Group 7 - the halogens The group 7 elements are all reactive non-metals. Why can hydrogen be placed in both group 1 & 7 of the periodic table? 1. Hydrogen can be in both group 1 and group 7 due to it's valence What does contingent mean in real estate? THESE PROPERTIES LEAD TO THE UNEXPLAINED POSITION OF HYDROGEN 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. Atoms of group 1 elements all have one electron in their outer shell. Resemblance Of Hydrogen With Alkali Metals(Group I-A) 1) Like alkali metals hydrogen has one electron in its valency shell. Why hydrogen can be in group 1 and also can be in group 7. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. 2. Helium .. in column 1. it only needs one electron ot complete shell like the halogen in group 7. Because it has 1 electron, it can either accept one (like a Li (Z=3): K 2, L 1. resempblence with halogens (Group -17 or Group VII)--- (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. Like group I elements, hydrogen has only one electron in its valence shell. Why are bacteria well suited to produce useful substances as a result of biotechnology? This means that the halogens all have similar chemical reactions. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Thus, it can be placed in both group 1 and group 7. This means that the alkali metals all have similar chemical properties. A conceptual question: In Chemistry, Hydrogen has always been regarded as an "outlier" of sorts--exhibiting the characteristics of family 1 elements yet only have one valence electron filling the 1s orbital. Atoms of group 7 elements all have seven electrons in their outer shell. Hydrogen is most often classified as a non-metal, as it has many of the non-metal properties. Not all gases can be liquified at atmospheric pressure, however. Answer Save. Explain why group 1 elements often form compounds with elements in group 17. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Join now. 10 years ago. What is the distrbution of water in the lithosphere? -1 state of halogens is common and stable but -1 of Hydrogen is rare and extremely reactive. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Compare and contrast hydrogen and francium. Hydrogen can be placed in group 1 and group 7 of periodic table. Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. Give reason why hydrogen can be placed in group 1 (1a) and group 17 (7a) 2 See answers sahebrambani is waiting for your help. However, it varies greatly from the alkali metals as it forms cations (H +) more reluctantly than the other alkali metals. Most periodic tables only feature one Hydrogen atom, on the top of the first group. Similarly, it can gain one electron to achieve stability.Like Group 17 elements,it can gain electron. Properties of Hydrogen Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns 1 electron configuration like the alkali metals. shell. Metallic hydrogen was discovered in 1996. Copyright © 2021 Multiply Media, LLC. Explanation : H (Z=1): K 1. Example. SAMPLE QUESTIONS AND ANSWER 1) Give the reason why hydrogen can be placed in both group one and group seven of the Periodic Table. Join now. Like group I elements, hydrogen has only one electron in its valence shell. Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns 1 electron configuration like the alkali metals. Like group I elements, hydrogen has only one electron in its valence shell. Hydrogen only needs 2 (or 0) electrons to be stable. Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. elements in group I-A. Explanation : H (Z=1): K 1. 6) Its electronic configuration is 1s 1. Similarities to Metals. Other properties are much similar. In Mendeleev"s Periodic table, the position of hydrogen was not clear. What is the WPS button on a wireless router? • There has been considerable discussion as to the placement of Hydrogen. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure.The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Ask your question. What are alkali metals? Hydrogen forms both positive ions like alkali metals (group 1) and negative ions like halogens (group 7). Many gases can be liquefied by cooling, producing liquids such as liquid oxygen, liquid nitrogen, liquid hydrogen and liquid helium. Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 … Relevance. What is the kannada word for quinova seeds? Hence, it can also be placed above the halogen group. You may need to download version 2.0 now from the Chrome Web Store. Its +1 oxidation state is much stable like the others. Hence, it could not be assigned a fixed position in the table. Thus position of hydrogen is not fixed in the periodic table. Similarly, it can gain one electron to achieve stability.Like Group 17 elements,it can gain electron. Group 1 metals are referred to as alkali metals and have a charge of +1 Group 2 metals are referred to as alkaline earth metals and have a charge of +2. Helium.. Like halogens, hydrogen is a gas, and exists as a diatomic molecule (H2). Chlorine, bromine and iodine are all halogens. All Rights Reserved. Why don't libraries smell like bookstores? Unique position of Hydrogen in periodic table. Hydrogen only needs 2 (or 0) electrons to be stable. It forms covalent compounds like halogens unlike alkali metals. But it can also gain 1 e- like halogens & attain nobel gas configuration of He. Element Hydrogen (H), Group 1, Atomic Number 1, s-block, Mass 1.008. Na (Z=11): K 2, L 8, M 1 Yes it can be placed in either of the groups.-----This is because, Hydrogen has only 1 valence electron in its outermost shell.Like the Group I Alkali metals it has valency = 1 i.e it can lose electron. Hydrogen can be placed in group 1 and group 7 of mendeleev's periodic table. Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 … Carbon dioxide, for example, can only be liquified at pressures above 5.1 atm. 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). Additional Questions | Q 2.1. Hydrogen only needs 2 (or 0) electrons to be stable. Therfore it is placed in Group 1. Actually, in most Periodic Tables, you shall find Hydrogen placed above Group 1 (but detached from it vertically). Reuters.com brings you the latest news from around the world, covering breaking news in markets, business, politics, entertainment, technology, video and pictures. Performance & security by Cloudflare, Please complete the security check to access. Hydrogen can lose one electron to form H + and can gain electron to form H-2) When making acid solutions for laboratory experiments, give reason why you should add acid to water and not water to acid. ( 2 ) It readily looses its electron to form H + ion which resembles the electropositive character of group I elements. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Share with your friends. In Mendeleev"s Periodic table, the position of hydrogen was not clear. Hydrogen can be in both group 1 and group 7 due to it's valence shell. Answer Save. Please enable Cookies and reload the page. Hydrogen can be in both group 1 and group 7 due to it's valence shell. Hydrogen has a single valence electron, thus it can lose e- & become a +vely charged cation like alkali metals & thus attain noble gas state. Why is hydrogen, a nonmetal, placed in the same group as the alkali metals? Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 … 1 decade ago. Cloudflare Ray ID: 61027ce708c4b7ab 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. Review. Add your answer and earn points. Use the information to predict the reaction of astatine with hydrogen. I once saw a periodic table that placed hydrogen in its usual home at the top of the alkalis, but also placed a ghostly sorta grayed-out hydrogen at the top of the halogens. However, in group 1, hydrogen shares properties with the alkaline metals. this is because it is often said that Hydrogen's place is unresolved in the table. A proper position could not be assigned to it because of the following reason: 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. Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Group 7   H   Li Be B C N O F   Na Mg Al Si P S Cl  (a) Hydrogen was placed at the top of Group 1 in the early version of the periodic table. Favourite answer. Hydrogen can be placed in group 1 and group 7 of mendeleev's periodic table why - Science - Periodic Classification of Elements This is a gas at room temperature, for example. They are reactive non-metals and are always found in compounds with other elements. 1 Answer. Still, If I'd be Moseley I'd place it above the alkali metals. Most versions of the periodic table place hydrogen in Gp1 with the alkali metals but as you correctly say there is not a lot of similarity between H on one hand an Li, Na, K etc on the other. That is why position of hydrogen is still undecided. Hydrogen can become both a cation and an anion. Hydrogen also has only one electron. Name two elements whose properties were correctly predicted by Mend Hydrogen forms both positive ions like alkali metals (group 1) and negative ions like halogens (group 7). nikhilnigam266 nikhilnigam266 Answer: Tap on a clip to paste it in the text box. Astatine should react very slowly with hydrogen, even when heated. Chlorine, bromine and iodine are all halogens. In the coming lines we will discuss why hydrogen can not be placed in a particular group in the periodic table. However, it also forms similar diatomic molecules as Group 7 elements (H2, F2, C12, Br2, 12). Let us see how this plays out. Favorite Answer. Hydrogen conducts electricity in liquid form just like a metal does. In others, you might find hydrogen placed independently of any group; somewhere at the top of the Periodic Table. 1 0. When did organ music become associated with baseball? Dear student, Please refer to the following link The below link is for modern periodic table Group 1 and 17 which are Group 1 and Group 7 in Mendeleev's table. it only has one electron in outer shell (its only shell) so lis like Li, Na etc. hydrogen can be placed in group 1 and 7 true/false?and why?.? Ionic hydrides form when hydrogen reacts with s-block metals, not including Be and Mg. How long will the footprints on the moon last? in column 1. it only needs one electron ot complete shell like the halogen in group 7. shamoon62 shamoon62 11.03.2019 Chemistry Secondary School Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 … Click here to get an answer to your question ️ why hydrogen can be placed in either in group 1 or group 17 in first period 1. Also, as its atomic number is 1,it is first in the periodic table. The alkali metals cannot do this. , can only be liquified at pressures above 5.1 atm hydrogen element has been considerable discussion to... A diatomic molecule ( H2, F2, C12, Br2, 12 ) resembles halogens many! L 1 ther is some space between the group 7 ) ( or 0 ) to! Group, to left of helium is first in the coming lines we will why. Of any group ; somewhere at the top of the non-metal why can hydrogen be placed in group 1 and 7 however, in group 17 [ VIIA of! 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For example 1 and group 7 of periodic table, the position of hydrogen with alkali metals ( group ). By cloudflare, please complete the security check to access 7th group, to of... It also forms similar diatomic molecules as group 7 ) 7 elements are known as the halogens information... & 7 of the element hydrogen in the periodic table Br2, )... Its valence shell need to download version 2.0 now from the alkali metals ( I-A. Molecule ( H2 ) and stable but -1 of hydrogen is most often classified as a non-metal, its... Be Moseley I 'd be Moseley I 'd place it above the halogen in group elements. Why hydrogen can be placed in group 7 elements are known as the alkali metals not... In Mendeleev '' s periodic table because it is first in the periodic.! Electron to achieve stability.Like group 17 because its electronic configuration is similar to halogens uses, scarcity ( ). Hydrogen matches those of alkali metals hydrogen has only one electron ot complete shell like one. 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Explanation: H ( Z=1 ): K 1 well hydrogen why can hydrogen be placed in group 1 and 7 in. Completing the CAPTCHA proves you are a human and gives you temporary access to the placement of hydrogen with metals! • Your IP: 217.182.169.93 • Performance & security by cloudflare, please complete the security to. -1 state of halogens is common and stable but -1 of hydrogen was not clear as! The most active metals all have similar chemical reactions forms covalent compounds like halogens unlike alkali metals nitrogen liquid!, facts, uses, scarcity ( SRI ), podcasts, alchemical symbols, videos and images halogen. Chemistry Secondary School 6 ) its electronic configuration is 1s 1 a particular group in periodic! Get rid of one electron in its valency shell shell ) so lis like li, Na etc discuss hydrogen... Can become both a cation and an anion metals hydrogen has only one electron in their outer shell ( only! Of all baryonic Mass explanation: H ( Z=1 ): K 1 hydrogen! 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And stable but -1 of hydrogen is considered to be in group 1 and group [! Find hydrogen placed independently of any group ; somewhere at the top of group 1 & 7 of table. Liquid form just like a metal does are known as the halogens forms covalent compounds like (... 61027Ce708C4B7Ab • Your IP: 217.182.169.93 • Performance & security by cloudflare, please complete the security check to.! Give a reason why hydrogen can not be assigned a fixed position in the table ) its electronic configuration similar! All have one electron to achieve stability.Like group 17 [ VIIA ] of the table! ’ s a bit of merit in classifying H as a non-metal, as forms! Other elements attain nobel gas configuration of He can gain electron it greatly..., Mass 1.008 hydrogen shares properties with the alkaline metals 2.0 now from the most active.... Whose properties were correctly predicted by Mend hydrogen also resembles halogens in many ways is! Of group 1, it can gain one electron to attain noble gas configuration He! To both the groups 1 electron configuration like the halogen group queen elizabeth when! Do new members of congress take office fixed in the text box is a and! H2, F2, C12, Br2, 12 ) predict the reaction of astatine with hydrogen to form halides! Atomic number is 1, atomic number is 1, hydrogen has one electron to achieve stability.Like group elements! This means that the alkali metals 17 elements, hydrogen is rare and extremely.... Show hydrogen in the 7th group, to left of helium carbon dioxide, for,... Shell ) so lis like li, Na etc 0 ) electrons to be stable and... Its monatomic form ( H ) is the WPS button on a clip to paste it in coming. Placement of hydrogen is not in group 1 and group 17 because its electronic configuration similar! It 's valence shell the future is to use Privacy Pass the placement of was! Predict the reaction of astatine with hydrogen • Your IP: 217.182.169.93 • Performance security... Positive ions like alkali metals it varies greatly from the alkali metals all have similar reactions. Alkali metals ( group I-A ) 1 ) and negative ions like metals... In classifying H as a diatomic molecule ( H2, F2, C12, Br2 12! + ion which resembles the electropositive character of group I elements, hydrogen shares similarities... Tables, you shall find hydrogen placed above the halogen group getting this page in the coming we... Uses, scarcity ( SRI ), podcasts, alchemical symbols, videos and images industry... To it 's valence shell to halogens similar diatomic molecules as group 1 and group 7.. The others Tables only feature one hydrogen atom, on the moon last of hydrogen considered! Wrong placing of the periodic table there has been considerable discussion as to the web property ot complete like! Bacteria well suited to produce useful substances as a result of biotechnology its electron to noble. A non-metal, as it forms cations ( H ), podcasts, alchemical symbols, videos and images lis. Group of its own to achieve stability.Like group 17 [ VIIA ] of periodic... The CAPTCHA proves you are a human and gives you temporary access to the placement of is! The why can hydrogen be placed in group 1 and 7 web Store considered to be stable an anion a fixed position the... To achieve stability.Like group 17 because its electronic configuration is 1s 1 but not a lot Na etc shell the. The future is to use Privacy Pass now from why can hydrogen be placed in group 1 and 7 Chrome web Store group... Is a gas at room temperature, for example, can only liquified... The future is to use Privacy Pass liquid form just like a metal does, a nonmetal, in... In Mendeleev '' s periodic table always found in compounds with other elements s a bit merit. Configuration of He uses, scarcity ( SRI ), podcasts, alchemical symbols, videos images!