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Assign reasons for the following : (b)...

Assign reasons for the following :
(b) The ionization energy of 5d elements are greater than 3d elements.

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The correct Answer is:
In the `5d` series, after lanthanum `(Z=57)`there is lanthanide contraction. As a result in each group the atomic size of `5d` element is small and its nuclear charge is large . Hence the ionisation energies of `5d` element are large than `3d` elements.
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  1. Which element among d-block element has(i) the lowest melting point an...

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  2. Why Zinc has lowest melting point in 3d series?

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  3. Assign reasons for the following : (b) The ionization energy of 5d e...

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