Most common oxidation state for Lanthanoid is +3. Oxidation numbers +2 and +4 do occur particularly when they lead to which of the following?
Answer & explanation
Correct answer: option 4
Most common oxidation state for Lanthanoid is +3. Oxidation numbers +2 and +4 do occur particularly when they lead to:
(i) A noble gas configuration (Ce4+)
(ii) A half-filled f-subshell (Eu2+ and Tb4+)
(iii) A completely filled f-subshell (Yb2+)