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