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).You need to login to perform this action.
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