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

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

The d-and f-Block Elements

Solution:

Number of electrons in excited state

$X^{+3}=18+4=22$

Number of electrons in ground state

$X=22+3=25$