1. Old nomenclature for Type 2
Transition metals were once named without using Roman numerals.
Instead used suffixes to represent charges. Not specific enough!!
Old professors in college still like to use and still see in many chemistry books, etc.
Root word, then –ic or –ous suffixes.
–ic used for larger charge; –ous used for smaller charge.

2. Fe3+ Iron (III)
Fe2+ Iron (II)
Cu2+ Copper (II)
Cu+ Copper (I)
Sn4+ Tin (IV)
Sn2+ Tin (II)
Hg2+ Mercury (II)
Hg2+ Mercury (I)
Pb4+ Lead (IV)
Pb2+ Lead (II)
Ferric
Ferrous
Cupric
Cuprous
Stannic
Stannous
Mercuric
Mercurous
Plumbic
Plumbous

3. Co3+ Cobalt (III) Cobaltic
Co2+ Cobalt (II) Cobaltous
Cr3+ Chromium (III) Chromic
Cr2+ Chromium (II) Chromous
Mn3+ Manganese (III) Manganic
Mn2+ Manganese (II) Manganous
Au3+ Gold (III) Auric
Au2+ Gold (II) Aurous