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Electronic Configuration of d-Block Elements

A transition ...

Question

A transition element X has the configuration $[A r] d^{4}$ 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 $[A r] d^{4}$ in +3 oxidation state, the neutral atom should have the configuration $[A r] 3 d^{5} 4 s^{2}$ ; 18+5+2=25, is the atomic number

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