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A transition element X has a configuration [Ar]3d^4 in its +3 oxidation state. Its atomic number is

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A transition element X has a configuration [Ar]3d4 in its +3 oxidation state. Its atomic number is

(a) 22

(b) 19

(c) 25

(d) 26

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Correct option (c) 25

Explanation :

It is the configuration of metal ion. The metal atom will have three more electrons. Therefore the atomic number of the metal = (18) + 4 + 3 = 25.

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