An element X belongs to fourth period and fifteenth group of the periodic table. Which one of the following is true regarding the outer- electronic configuration of X ? It has

Options

A. It has partially filled d-orbitals and completely filled s-orbitals.
B. It has completely filled s-orbitals and half-filled p-orbitals.
C. It has half-filled p-orbitals and completely filled s-orbitals.
D. It has half-filled d-orbitals and completely filled s-orbitals.

Answer

C

Explanation

The electronic configuration of'X' can be written as X=`1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d^(10)4p^(3)` so element 'X' has completely filled s-and d-orbitals and half-filled porbitals.