Question

What is the electron configuration for ${\mathrm{S}}^{2-}$ ion?

Answer 1

Sulfur:

• Sulfur is an element having an atomic number $16$ and an atomic symbol $\mathrm{S}$.
• It belongs to p-block elements and lies in Group-$16$.

Electronic configuration: The arrangement of electrons into the orbitals of an atom using some fundamental principle is called its electronic configuration.

Electronic configuration of Sulfur $\left(\mathrm{S}\right)$:

• The electronic configuration of Sulfur is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^4$.

Electronic configuration of Sulfide $\left({\mathrm{S}}^{2-}\right)$:

• Sulfide ion is formed by the two electrons.
• The electronic configuration of Sulfur ion is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^6$.
• The $8$ valence electrons in the sulfide ion encounter a large amount of repulsion between electrons than the $6$ valence electrons in the neutral sulfur atom.