Which of the following can exhibit +4 oxidation state?

Options

A. La
B. Ce
C. Eu
D. Gd

Answer

B

Explanation

Ce can exhibit +4 oxidation state. Electronic configuration of Ce is `[Xe]4f^2 5d^0 6s^0 ` . It loses 2 electrons from 4f and 2 electrons from 6s orbitals and gives stable electronic configuration for `Ce^(+4)` ion `[Xe] 4f^0 5d^0 6s^2`