Discussion Forum

 Which of the following actinoids exhibits only +3 oxidation state?

Answer:

Explanation:

 Lawrencium (Lr) shows only 3+ oxidation state, that has  electronic  configuration [Rn]  5f¹⁴ 7s² 7p¹ . This element may easily give up three valance electron from the 7s and 7p subshell to form a stable +3 oxidation state. the state is especially stable in case of Lr  because it contains full-filled (5 f¹⁴ ) f-subshell.