Which among the following elements is not a transition metal?

Iron and nickel

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Titanium and manganese

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Scandium and vanadium

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Zinc and cadmium

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Solution

The correct option is D
Zinc and cadmium

A transition element is one whose atom or ion contains incompletely filled d-orbitals. In case of zinc and cadmium neither the atom nor the ion has incompletely filled d-orbitals.

e.g., Zn - 30 : 3d¹⁰,5s²

Cd - 48 : 4d¹⁰,5s²

So,d-block elements Zn and Cd are normally not considered as transition elements.

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