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Atoms of the transition element are smal...

Atoms of the transition element are smaller than those of the s-block elements, because :

A

there is increase in the nuclear charge along the period.

B

orbital electrons are added to the penultimate d-subshell rather than to the outer shell of the atom.

C

the sheilding effect of d-electrons is small.

D

All of these

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The correct Answer is:
D
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