Question

how many valence electrons are in s²⁻?

Explanation:

Step1: Determine sulfur's original valence electrons

Sulfur (S) is in Group 16 of the periodic table. Atoms in Group 16 have 6 valence electrons.

Step2: Consider the ion charge

The $S^{2 -}$ ion has a -2 charge, which means it has gained 2 electrons.

Step3: Calculate the total valence electrons

The total number of valence electrons is the original number of valence electrons plus the number of electrons gained. So, $6 + 2=8$.

Answer:

8