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

Answer

2

Explanation

Electronic configuration of species.
`._(22)Ti^(+2)=[Ar]3d^(2)4s^(@)`
`._(23)V^(+3)=[Ar]3d^(2)4s^(@)`
`._(24)Cr^(+4)=[Ar]3d^(2)4s^(@)`
`._(25)Mn^(+5)=[Ar]3d^(2)4s^(@)`