Question

Hydrogen can be placed in group 1 and group 17. Why

Answer 1

Answer:

• as it show the properties of both halogen group and alkali group.
• like group 1 alkali group has valency 1 i.e it can lose 1 electron .
• like halogen group that can gain 1 electron to obtain stability it can also gain 1 electron.

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Answer 2

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ANSWER :

Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups.

Like group I elements, hydrogen has only one electron in its valence shell. Thus it can lose an electron to achieve a stable configuration like alkali metals and hence can be placed in group 1 (alkali metals).

However, like group 17 elements, it requires only electron to complete its valence shell, thus it can also gain an electron to achieve a noble gas configuration.

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