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Q.

Number of valence electrons in Cl– ion are:

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a

8

b

17

c

16

d

18

answer is B.

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Detailed Solution

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

Cl− is formed by adding one electron so the new electronic configuration is 2, 8, 8. So the valence electrons are 8.

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