The +3 oxidation states of langthanum ( Z= 57), gadolinium (Z= 64) and – InterviewSolution

1.	The +3 oxidation states of langthanum ( Z= 57), gadolinium (Z= 64) and lutetium (Z= 71) are especially stable. Why ?
Answer» SOLUTION :This is because in the `+3` oxidation STATE, THEYHAVE empty, half-filled and completely filled4f sub-shell respectively.

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