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Why are E°M2+/M values of Mn and Zn more negative than expected ?
Define transition elements. Write two characteristics of transition elements.
Account for the following : (i) Zr and Hf have almost similar atomic radii. (ii) Transition metals show variable oxidation states. (iii) Zinc has lowest enthalpy of atomisation.
Why transition metals and their compounds act as good catalyst ? How is the variability in oxidation states of transition metals different from that of the non-transition metals ? Illustrate with examples.
Assign reason for each of the following :
Why do transition metals have high enthalpy of atomization ? Which element of 3d-series has lowest enthalpy of atomization ?
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