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Question

Hydrogen finds a place in VII A group of periodic table because_________.
  1. it is a light element
  2. H atom has only one electron in its valence shell
  3. it forms hydride of the type NaH
  4. it has 7 isotopes

A
it is a light element
B
H atom has only one electron in its valence shell
C
it has 7 isotopes
D
it forms hydride of the type NaH
Solution
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Hydrogen finds a place in VII A group of periodic table because hydrogen forms a compound NaH like halogens NaX (X is halogen).

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