Among the following series of transition metal ions the one where all meal ions have `3d^2` electronic configuration is

Options

A. `Ti^(3+),V^(2+),Cr^(3+),Mn^(4+)`
B. `Ti^(+),V^(4+),Cr^(6+),Mn^(7+)`
C. `Ti^(4+),V^(3+),Cr^(2+),Mn^(3+)`
D. `Ti^(2+),V^(3+),Cr^(4+),Mn^(5+)`

Answer

D

Explanation

`Ti^(2+) = 1 s^(2) 2 s^(2) 2 p^(6) 3 s^(2) 3 p^(6) 3 d^(2) 4 s^(0)`
`V^(3+) = 1 s^(2) 2 s^(2) 2 p^(6) 3 s^(2) 3 p^(6) 3 d^(2) 4 s^(0)`
`Cr^(4+) = 1 s^(2) 2 s^(2) 2 p^(6) 3 s^(2) 3 p^(6) 3 d^(2) 4 s^(0)`
`Mn^(5+) = 1 s^(2) 2 s^(2) 2 p^(6) 3 s^(2) 3 p^(6) 3 d^(2) 4 s^(0)`