Q7 / 54 · KVPY 2017 (5 Nov SA) · Chemistry

The metal ion with total number of electrons same as $S^{2}$ is

  • A
    $\mathrm{N}^{\mathrm{a}+}$
  • Correct answer
    B
    $\mathrm{Ca}^{2+}$
  • C
    $\mathrm{Mg}^{2+}$
  • D
    $\mathrm{Sr}^{2+}$

Solution

$\mathrm{S}^{-2}$ has 18 electrons $\&$ so $\mathrm{Ca}^{+2}$ ion are having

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

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