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Question
Number of valence electrons in Cl− ion are ______.
Options
16
8
17
18
MCQ
Fill in the Blanks
Solution
Number of valence electrons in Cl− ion are 8.
Explanation:
Electronic configuration of Cl (Z = 17)
= 2, 8, 7.
Thus, it has 7 valence electrons.
CI gains 1 electron to form CI- ion.
So, the number of valence electrons = 7 + 1 = 8.
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