Learning Target: Comparing and contrasting Covalent and Ionic Compounds.

Ionic compounds are compounds with a non-metal bonding to a metal. To form Chemical Formulas you need to focus on the ions charges.
Covalent (Molecular) compounds are a compound with two Non-metals bonding together. With writing Chemical Formulas, you ignore the Ions Charges, but pay attention to the quantity, and use the according prefixes.