Question

decide if ionic vs. covalent by
a. if ionic, then use the name of the metal ion (or positive ion) followed by the name of the negative ion)
b. if covalent, then use the names of each element with an ending for the 2nd element, and use to tell how many of each atom you have.

Explanation:

For ionic compounds, naming follows the metal - ion then non - metal ion pattern. For covalent compounds, the second element has an -ide ending and prefixes are used to indicate the number of atoms of each element.

Answer:

A. Naming rule for ionic compounds.
B. -ide; prefixes