Q14 / 180 · COMEDK 2020 · Chemistry

The electronic configuration of $\mathrm{Cr}^{3+}$ is

  • A
    [Ar] $3 d^{5} 4 s^{1}$
  • B
    $[\mathrm{Ar}] 3 d^{2} 4 s^{1}$
  • Correct answer
    C
    $[\mathrm{Ar}] 3 d^{3} 4 s^{0}$
  • D
    $[\mathrm{Ar}] 3 d^{4} 4 s^{2}$

Solution

Electronic configuration of $\mathrm{Cr}=[\mathrm{Ar}] 3 d^{5} 4 s^{1}$ Electronic configuration of $\mathrm{Cr}^{3+}=[\mathrm{Ar}] 3 d^{3} 4 s^{0}$

Hence, the correct answer is option: 'C'.

Relevant Questions