

MCQOPTIONS
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1. |
An element has the electronic configuration \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{2}}\]. Its valency electrons are [NCERT 1973] |
A. | 6 |
B. | 2 |
C. | 3 |
D. | 4 |
Answer» E. | |