Find the number of transition elements in the following:
$Zn, Cd, Hg, Pt, U, Sn$

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answer is 1.

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Detailed Solution

Pt Only

Three elements (Zn, Cd and Hg) are not transition elements. They contain completely filled d orbitals. Hence, they are d-block elements but not transitional.

Pt is transition element, hence answer is 1.

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