A) 49
B) 31
C) 34
D) 33
Correct Answer: D
Solution :
The electronic configuration of given element is\[1{{s}^{2}},2{{s}^{2}},2{{p}^{6}},3{{s}^{2}},3{{p}^{3}}\]. It is the electronic configuration of phosphorus. It is the element of IIIA group. Hence, the atomic number of the element below phosphorus will be 33 (arsenic).
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