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Why do transition elements show variable oxidation states?(i) Name the element showing maximum number of oxidation states among the first series of transition metals from Sc (Z = 21) to Zn (Z = 30).(ii) Name the element which shows only +3oxidation state. |
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Answer» Transition elements show variable state oxidation in their compounds because there is a very small energy difference in between (n-1)d and ns orbitals. As a result, electrons of (n-1)d orbitals as well as ns-orbitals take part in bond formation. (i) Mn(Z-25) has the maximum number of unpaired electrons present in the d-subshell so it shows maximum oxidation states(+7). (ii) Sc only exhibits a +3 oxidation state in these series. |
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