MCQ
A transition metal $X$ has a configuration $[Ar]3{d^4}$ in its $ + 3$ oxidation state. Its atomic number is
- ✓$25$
- B$26$
- C$22$
- D$19$
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(Assume: Momentum is conserved when photon is absorbed. Use: Planck constant $=6.6 \times 10^{-34} J s$, Avogadro number $=6 \times 10^{23} mol ^{-1}$, Molar mass of $He =4 g mol ^{-1}$ )