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jan 11

why can hydrogen be placed in group 1 and 7

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

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