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Question

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

A

25

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B

26

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C

22

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D

19

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Solution

The correct option is A

25


If the element has [Ar]d4 in +3 oxidation state, the neutral atom should have the configuration [Ar]3d54s2; 18+5+2=25, is the atomic number

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