Question
Science Question on Valency
Number of valence electrons in Cl– 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.