Gadolinium contain one electron in 5d-orbital due to

Options

A. stability of `4f^(0)` configuration
B. stability of `4f^(7)` configuration
C. stability of `4f^(14)` configuration
D. none of these

Answer

B

Explanation

We know that, according to Hund's rule empty, half filled and completely filled electronic configurations are most stable. Hence Gd configurations are most stable. Hence Gd configurations are most stable. Hence Gd shows `6s^(2), 4f^(7), 5d^(1)` condiguration.