A) 6
B) 2
C) 3
D) 4
Correct Answer: D
Solution :
An element has the electronic configuration \[1{{s}^{2}},\,2{{s}^{2}}\,2{{p}^{6}},\,\,3{{s}^{2}}\,3{{p}^{2}},\,(Si)\]. It?s valency electrons are four.You need to login to perform this action.
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