Binary Ionic Compounds
Compounds formed from main group elements are determined by crossing the known charges or oxidation numbers to determine the number of each ion
The ion with the lower charge takes the suffix -ous
The ion with the higher charge takes the suffix -ic
FeCl2 Traditional System?
Cu2O Traditional System?
Cuprous, Charge of +1 on the copper ion means 2 ions must neutralize -2 charge on oxide
Instead of Latin names and suffixes to indicate which ion is present, Roman numerals and modern names are used.
Copper (I) oxide
you use prefix mono, di, tri, tetra etc
Use the prefixes to denote how many ions or atoms are present