The greatest number of oxidation states are exibited by the members in the middle of the transition series... why??
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It's because the half filled orbitals are more stable.
Chromium is has electronic configuration of [Ar]4s1 d5 .it's supposed to be 4s2 d4 according to the rule.But d orbital Attracts an electron from s to attain half filled state d5 which more stable.Hence chromium has oxidation state of upto +6Next is Manganese, here s orbital is filled completely and d orbital has half filled configuration. So,its oxidation state can be up to +7The thing is,Half filled orbital are stable because electrons are at same spin.
It's a rule of nature,Every object tends to occupy a lowest energy state(stable state)
Chromium is has electronic configuration of [Ar]4s1 d5 .it's supposed to be 4s2 d4 according to the rule.But d orbital Attracts an electron from s to attain half filled state d5 which more stable.Hence chromium has oxidation state of upto +6Next is Manganese, here s orbital is filled completely and d orbital has half filled configuration. So,its oxidation state can be up to +7The thing is,Half filled orbital are stable because electrons are at same spin.
It's a rule of nature,Every object tends to occupy a lowest energy state(stable state)
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