1.

The electronic which will exhibit maximum no. of oxidation states (a)  1s2 2s2 2p6 3s2 3p5 (b)  1s2 2s2 2p6 3s2 3p6 4s2 3d5 (c)  [Xe] 4f14 5d6 6s2 (d)   [Ar] 4s2 4p4

Answer»

(c)   [Xe] 4f14 5d6 6s2



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