The Lewis model predicts that the formula for a compound between barium and sulfur is:

Question

Quizplus · Accepted Answer

According to the Lewis model, barium has two valence electrons while sulfur has six. In order to achieve a stable octet, barium needs to lose two electrons and sulfur needs to gain two electrons. This results in the formation of an ionic bond between barium and sulfur, with barium losing two electrons to become a cation with a 2+ charge (Ba2+) and sulfur gaining two electrons to become an anion with a 2- charge (S2-). The formula for the ionic compound is therefore BaS.

The Lewis Model Predicts That the Formula for a Compound