A) an atomic number 3
B) 3 complete sub-shell
C) 3 valence electrons
D) 3 electrons less than the octet
Correct Answer: C
Solution :
The general electronic configuration of III A group elements, is \[n{{s}^{2}}n{{p}^{1}},\] i.e., there are 3-valence-shell electrons in each elements atom of group III A.
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