Sulfur atoms are able to form the negative ion $\text{S}^{2-}$. The following three atoms or ions are given. • argon, $\text{Ar}$ • calcium, $\text{Ca}$ • oxide, $\text{O}^{2-}$ What number of these atoms or ions has the same electronic configuration as $\text{S}^{2-}$?
- A0
- B1
- C2
- D3