A) 1
B) 2
C) 3
D) 4
Correct Answer: A
Solution :
The element having atomic number 9 is fluorine. Its electronic configuration is as: \[F(9):1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{5}}\] Hence, its valency is one.You need to login to perform this action.
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