A transition element `X` has a configuration `[Ar] 3d^(4)` in its ` + 3` oxidation state. Its atomic number is

Options

A. 25
B. 26
C. 22
D. 19

Answer

A

Explanation

Given, `X=[Ar]d^(4)`
`:.` The complete configuration of the ion,
`X^(3+)=1s^(2),2s^(2),2p^(6),3s^(2),3p^(6),3d^(4)`
`:.X=1s^(2),2s^(2),2p^(6),3s^(2),3p^(6),3d^(5),4s^(2)`
` :. `The atomic number of the element is 25 and the element is Mn.