Question

Hydrogen differs from elements of VII-A group as:

• A. it can gain one electron
• B. it has one electron in its valence shell
• C. its electronic configuration is different from other elements
• D. both $B$ and $C$

Answer 1

The correct option is D both $B$ and $C$

Hydrogen differs from elements of $VII-A$ group as:

(A) Hydrogen can either share or gain or lose one electron whereas the elements of $VII-A$ group can gain one electron.

(B) Hydrogen has one electron in its valence shell whereas elements of $VII-A$ group have 7 valence electrons.

(C) The electronic configuration of hydrogen is different from the elements of $VII-A$ group.

So, options B and C are the correct answers.