First slide
Periodicity in atomic properties

Which has most stable +2 oxidation state 


Pb2+5d106s2 has the most stable +2 oxidation state because here the d-orbital is completely filled and is more stable than Fe2+3d6. Again Ag+4d10 is more stable as here again the d-orbital is completely filled and Ag2+ is not easily obtained. Pb2+ is more stable compared to Sn2+4d105s2

because of its large size.

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