Answer:
The answer to your question is:
Explanation:
Formulas given       Status          Correct formulas
NaO₂               Incorrect          Na₂O
RbCl                Correct    Â
Kâ‚‚S Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Correct
Al₂Cl₃               Incorrect         AlCl₃
MgP₂               Incorrect         Mg₃P₂