Common oxidation state of f-block elements is III. The other stable oxidation states of ^63 Eu and ^65 Tb are respectively

Question

Accepted Answer

Correct answer: A. (a) Common oxidation state of f-block elements is (+ )3, but Eu and Tb can also show (+)2 and (+)4 oxidation states respectively.

$Common oxidation state of f -block elements is III. The other stable oxidation states of^{63} Eu and^{65} Tb are respectively$