why can hydrogen be placed in group 1 and 17

There has been considerable discussion as to the placement of Hydrogen. +1 (Hydrogen has an oxidation state of +1, and oxygen has an oxidation state of -2. The valance electronic configuration of hydrogen is the same with the group 1A elements. Hydrogen's Placement in the Periodic Table. Each water molecule (H 2 O) contains two hydrogen atoms. no. Solution: Hydrogen element has been placed at the top of group 1, above the alkali metals because the electronic configuration of hydrogen is similar to those of alkali metals. it has le, IP in nucleus. THESE PROPERTIES LEAD TO THE UNEXPLAINED POSITION OF HYDROGEN Electronic configuration of hydrogen is 1 i.e. Group 1A elements such as H, Li, K,etc. Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 â¦ 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. hi.. well hydrogen IS NOT in group 1 of the periodic table.. Other properties are much similar. Where is hydrogen found on earth? Hydrogen has 1 valence electron (its only electron), so it is placed atop group one, however, it is not an alkali metal (the rest in that group are.) It forms covalent compounds like halogens unlike alkali metals. It can both lose as well as gain an electron. There are many reasons for including hydrogen among the elements in Group IA. 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. Like halogens, hydrogen is a gas, and exists as a diatomic molecule (H2). 1].e Give a reason why hydrogen can be placed in group 1 [1A] and group 17 [VIIA] of the periodic table. this is because the electronic configaration of h2 is similar to alkali metal. These s-block elements are found in Group 1 and Group 2 of the periodic table and are the most active metals. Resemblance with alkali metals Hydrogen can be placed in group 1[1A] as it forms a positive ion as in HC1 like alkali metals H - 1e-â H 1+ Li - 1e-â Li 1+ Na - 1e-= Na 1+ It can be placed in group 17 [VIIA] As it can form a negative ion as in NaH like Halogens H + 1e-â H 1- Cl + 1e-â Cl 1- 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. Hydrogen is a diatomic gas in it's elemental state, which is different from the other group one metals (and similar to the group â¦ Add your answer and earn points. both have valency 1. Li (Z=3): K 2, L 1 Like the res of column 17, it only takes 1 e- â¦ 3) In some hydrogen differs from both alkali metals and halogens. This leads to lower â¦ Astatine should react very slowly with hydrogen, even when heated. Hydrogen can also be placed in Group 17, because it can acquire a second electron to form a hydride ion, H-, just as the other elements in Group 17 can form 1- ions. Li , K , Na , K, Rb ,Cs and Fr of group 1 of the periodic table. Hydrogen is also found in a wide range of compounds throughout the earth including hydrocarbons, acids, and hydroxides. Astatine is placed below iodine in group 7. In others, you might find hydrogen placed independently of any group; somewhere at the top of the Periodic Table. This is mainly due to a decrease in ionization energy down the group. 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. H can also be in column 17, because it only takes 1 e- to fill that outer ring, forming a H- ion, hydride. elements in group I-A. In the coming lines we will discuss why hydrogen can not be placed in a particular group 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. Hydrogen can be placed in group number 1 or (but not normally) in group number 17 because it has some properties similar to both groups.. On one hand , it exhibits the property of alkali metals by losing one electron to get a positive charge ( H --> H + + e-). Hydrogen also has only one electron. Group number indicates the number of valence electrons or outer electronic configuration. It can get rid of one electron to attain noble gas configuration. why Hydrogen could be placed in group I or group VII of the periodic table.? Example. Use the information to predict the reaction of astatine with hydrogen. Hydrogen shares many similarities with alkali metals, i.e. Actually, in most Periodic Tables, you shall find Hydrogen placed above Group 1 (but detached from it vertically). Its +1 oxidation state is much stable like the others. Hydrogen also resembles halogens in many ways. Answer: Electronic configuration of hydrogen is 1 i.e. As a result it can be placed in group 1, as it usually is, or with the halogens in group 17 (fig 4). Still, If I'd be Moseley I'd place it above the alkali metals. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Find an answer to your question give reason why hydrogen can be placed in group 1 (1a) and group 17 (7a) sahebrambani sahebrambani 5 minutes ago Chemistry Secondary School Give reason why hydrogen can be placed in group 1 (1a) and group 17 (7a) 2 See answers sahebrambani is waiting for your help. please remember ther is some space between the group 1A and Hydrogen. The most common place to find hydrogen on earth is in water. Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. The other period 1 element, helium, is most often placed in group 18 with the other noble gases, as its extraordinary inertness is extremely close to that of the other light noble gases neon and argon. State the electronic configuration of hydrogen [at. 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. single electron in outermost shell. This characteristic of hydrogen matches those of alkali metals. Similarly, it can gain one electron to achieve stability.Like Group 17 elements,it can gain electron. Hydrogen can be placed in group 1[1A] as it forms a positive ion as in HC1 like alkali metals H. Question 2. Where do you think should hydrogen be placed in the Modern periodic table? Similarities to Metals. Therefore, chlorine must have an oxidation state of +1 so that the total charge can be zero) +5 (Potassium's oxidation state is +1. Finally, hydrogen is sometimes placed separately from any group; this is based on its general properties being regarded as sufficiently different from those of the elements in any other group. Like group I elements, hydrogen has only one electron in its valence shell. [11] Let us see how this plays out. Oxygen has an oxidation state of -2, so for this compound it is -6 (-2 charge x 3 atoms= -6). 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. H has 1 e- in the outer ring such as those in column 1, and likes to give it away forming H+, positive ion. Hydrogen is placed in the group and period 1 of this table. Hydrogen gas is made up of diatomic molecules designated as H 2. Hydrogen is considered to be in a group of its own. Ionic hydrides form when hydrogen reacts with s-block metals, not including Be and Mg. Element Hydrogen (H), Group 1, Atomic Number 1, s-block, Mass 1.008. Hence, it can also be placed above the halogen group. In this 1871 version, copper, silver, and gold were placed twice, once as part of group IB, and once as part of a "group VIII" encompassing today's groups 8 to 11. Explanation : H (Z=1): K 1. Some reasons why hydrogen was placed in the group 1A elements are as follows: It has a valence electron of 1. Like group I elements, hydrogen has only one electron in its valence shell. First and foremost reason being that it is similar to alkali metals in electronic configuration(1s1) i.e. Resemblance Of Hydrogen With Alkali Metals(Group I-A) 1) Like alkali metals hydrogen has one electron in its valency shell. The reactions of the Group 2 elements proceed more readily as the energy needed to form positive ions falls. it has le, IP in nucleus. 2) In some other properties, hydrogen resembles halogens.As such, it can be placed in group 17 along with halogens. have 1 valency. Two years later, Mendeleev revised his table, placing hydrogen in group 1 above lithium, and also moving thallium to the boron group. But they hydrogen atoms can also gain one electron similar to halogens. It has even been suggested that hydrogen should be grouped at the head of the carbon group since, like carbon, its atom has a half-filled outer shell. Hydrogen is the first element in the periodic table of Mendeleev - atomic number 1. this is because it is often said that Hydrogen's place is unresolved in the table. That is why position of hydrogen is still undecided. Why there is an anomaly when it comes to the position of hydrogen Get the answers you need, now! 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. it is placed ABOVE the group and not as â¦ -1 state of halogens is common and stable but -1 of Hydrogen is rare and extremely reactive. Metallic hydrogen was discovered in 1996. atish1 atish1 13.03.2016 Chemistry Secondary School ... *but it is placed at the top of group 1 above the alkali metal. On newer periodic tables, that is 1 and 17. Multiple Choice Questions (MCQs) [1 Mark each] Question 1. Because hydrogen forms compounds with oxidation numbers of both +1 and -1, many periodic tables include this element in both Group IA (with Li, Na, K, Rb, Cs, and Fr) and Group VIIA (with F, Cl, Br, I, and At). Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 â¦ The two hydrogens are the same, but some periodic tables show hydrogen in both places to emphasize that hydrogen isn't really a member of the first group or the seventh group. the main groups are numbered from 1 to 7 going from left to right, and the last group on the right is Group 0 the block in between Group 2 and Group 3 is where the transition metals are placed Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Group 1A elements such as H 2 unlike alkali metals the earth including hydrocarbons, acids, and has... Constituting roughly 75 % of all baryonic Mass reason being that it is (! Hydrogen shares many similarities with alkali metals predict the reaction of astatine with hydrogen the coming lines we will why! 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