Electron distribution of two elements `P` and `Q` in their outermost shell is shown below .

Atomic number of `P` and `Q` are respectively

Options

A. 9, 17
B. 15,17
C. 24,17
D. 17,24

Answer

C

Explanation

Electronic configuration of P :
`{:(K,L,M,N),(2,8,8,6):}`
So , its atomic number = 24
Electronic configuration of Q : `{:(K,L,M),(2,8,7):}`
So, its atomic number = 17