Which of the following configurations will have the same number of unpaired electrons as that of a lanthanoid ion having configuration of `4f ^n`: `5f^n`, `5f^(14-n)`, `4f^(14-n)`, `4f^(14-(n+1))`,

Options

A. A) `5f^n`
B. B) `5f^(14-n)`
C. C) `4f^(14-n)`
D. D) `4f^(14-(n+1))`

Answer

C

Explanation

Lanthanoid ions having `mf^n " and " mf^(14-n)` configuration have the same number of unpaired electrons.