Which of the following should be the number of electrons present in $\mathrm{X}^{2+}$ on the basis of electronic configuration, if the ion $\mathrm{X}^{3-}$ has 14 protons?

Question

Aicharya · Accepted Answer

$\mathrm{X}^{3-}$ has 14 protons, i.e.,
$\mathrm{X}$ also has 14 protons and therefore 14 electrons.
$\mathrm{X}=14=1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{2}$
$\mathrm{X}^{2+}=1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2}=12$ electrons

Which of the following should be the number of electrons present in $\mathrm{X}^{2+}$ on the basis of…

Solution