The atomic number of cerium (Ce) is 58. the correct electronic configuration of `Ce^(3+)` ions is-

Options

A. `[Xe]4f^(1)`
B. `[Kr]4f^(1)`
C. `[Xe]4f^(13)`
D. `[Kr]4d^(1)`

Answer

A

Explanation

The electronic configuration of
`Xe:1^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)4s^(2)4p^(6)4d^(10)4d^(0)5s^(2)5p^(6)`
Electronic configuration of `Ce:[Xe]:4f^(1)5d^(1)6s^(2)`.
Thus, correct electronic configuration `Ce^(3+)=[Xe]4f^(1)`.