Gadolinium belongs to 4f-series. Its atomic number is 64. which of the following is the correct electronic configuration of gadolinium-

Options

A. `[Xe]4f^(8)6d^(2)`
B. `[Xe]4f^(9)5s^(1)`
C. `[Xe]4f^(7)5d^(1)6s^(2)`
D. `[Xe]4f^(6)5d^(2)6s^(2)`

Answer

C

Explanation

Electronic configuration of `""_(64)Gd:[Xe]4f^(7)5d^(1)6s^(2)`.