What do covalent compounds use in their names that ionic compounds do not?

Answer 1

One thing used in naming covalent compounds that is not used in naming ionic compounds is the use of prefixes such as di, tri, penta, etc. For example N₂O₅ is named dinitrogen pentoxide (a covalent compound), but Na₂O (an ionic compound) is simply named sodium oxide (not di sodium oxide).