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  4. In the first row transition metals, the element that exhibits only +3 oxidation state is

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Q. In the first row transition metals, the element that exhibits only $+3$ oxidation state is

KEAMKEAM 2021

Solution:

Scandium exhibits only $+3$ oxidation state as it can form $S c^{3+}$ ion to achieve a noble gas configuration $\left([N e] 3 s^2 3 p^6\right)$.