Question
Question: The electronic configuration of an element is 1s<sup>2</sup>, 2s<sup>2</sup>, 2p<sup>6</sup>, 3s<sup...
The electronic configuration of an element is 1s2, 2s2, 2p6, 3s2 3p3. What is the atomic number of the element which is just below the above element in the periodic table ?
A
34
B
49
C
33
D
31
Answer
33
Explanation
Solution
Z = 15 ; 7N , 15P , 33As