Question

4. Cerium exhibits both +3 and +4 oxidation states. Why?​

Answer 1

Answer:

Their electronegative value is nearly equal to s-block elements. So they can lose electrons to form cation. When Cerium loses 4 e-, it will acquire fully field electronic configuration of Xenon (2,8,18,18,8). ... That is why Cerium exhibits +4 oxidation state.

Explanation: