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

Answer

C

Explanation

The element is As and its electronic configurattion is
`1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)4s^(2)4p_(x)^(1)4p_(y)^(1)4p_(z)^(1)`