Which of the of following does not have valence electron in 3d-series ?

Options

A. Fe (III)
B. Cr(I)
C. Mn(II)
D. P(0)

Answer

D

Explanation

Phosphorus (P) has electronic configuration `1 s^(2),2s^(2),2p^(6),3s^(2),3p^(3)`
Therefore , no valence electron is present in the 3d-subshell.
Fe (III) has electronic configuration :
`3d^(5)4s^(0)`
`Cr(I)=3d^(5)4s^(0)`
`Mn(II)=3d^(5)4s^(0)`