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Question

Science Question on Valency

Number of valence electrons in ClCl^– ion are:

A

16

B

8

C

17

D

18

Answer

8

Explanation

Solution

The electronic configuration of chlorine(Atomic number-17) is 2, 8, 7.

The new electronic configuration of Cl^− is 2, 8, 8. So the valence electrons is 8.

The correct option is (b) 8.