Q. 524.8( 5 Votes )

What is the number of valence electrons in:

(a) sodium ion, Na+

(b) oxide ion, O2-

Answer :

(a) 8 is the number of valence electrons in sodium ion, Na+ has the electronic configuration of 2, 8.

(b) 8 is the number of valence electrons in oxide ion, as O2- have the electronic configuration of 2, 8.


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