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Why does element cerium exibits 4 oxidation state?

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Answer lies in the electronic configuration of Cerium. Any atom exhibit oxidation state in which it is found to be stable. It is second element of Lanthanide series having atomic number 58. General electronic configuration is [Xe] 4f1 5d1 6s2. Lanthanide are very less electronegative. read more

But some of the elements also show +2,+4 etc oxidation states. These extra oxidation states are stable due to the presence of either half filled or fully filled or empty f sub shell. Cerium shows +4 oxidation state.. Cerium has the atomic number=58. Electronic configuration = 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 4f 1 5d 1 6s 2 Cerium shows +3, and +4 oxidation state. read more

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