1.

(a) Why is separation of lanthanoid elements dificult ?(b) Transition metal exhibit higher enthalpies of atomization. Explain why ?(c) Why have the transition metal high enthalpy of hydration ?

Answer»

(a) Due to lanthanide contraction, the size of           these elements is nearly same.
(b) Transition metal contain large number of unpaired electrons, and they
have strong interatomic attractions.
(c) Due to their small size and large nuclear charge.



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