Which of the following does not have valence electrons in 3d-subshell?

Options

A. Fe(III)
B. Mn(II)
C. Cr(I)
D. Ti(IV)

Answer

D

Explanation

`Fe^(3+)(Z-26) rarr [Ar] 3d^5`
`Mn^(2+)(Z=25) rarr [Ar]3d^5`
` Cr^(+)(Z=24) rarr [Ar] 3d^5`
`Ti^(4+) (Z=22) rarr [Ar]` i.e no d- electron.