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A transition element X has a configurati...

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

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Configuration of the ion `=[Ar] 3d^(4)`
Oxidation state of the ion `=+3`
`:. ` The electronic configuration of the atom `=[Ar] 3d^(5)4s^(2)`
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