Binary Compounds - contain two elements;    NaCl, H₂S.

Ternary Compounds - contain three elements;   H₂SO₄, NH₄Cl

Compounds containing a metal and one or more nonmetals are considered
ionic and most are considered salts.   K2S,     Zn3(PO4)2,

Compounds containing only nonmetals are considered  molecular.  CO₂,   C₆H₁₂O₆

The alkali and alkaline earth metals plus Al³⁺, Ga³⁺, Zn²⁺, Cd²⁺ and Ag⁺ exhibit single valances; KF, CaF2, AlF3.

Other common metals exhibit multiple valances.  SnF2, SnF4, CuF, CuF2

                   IUPAC and Common Names

   Cu⁺          copper(I)           cuprous
   Cu²⁺        copper(II)          cupric
    Sn²⁺          tin(II)               stannous
    Sn⁴⁺        tin(IV)             stannic
   (Hg₂)²⁺   mercury(I)         mercurous
    Hg²⁺       mercury(II)        mercuric
    Fe²⁺       iron(II)              ferrous
    Fe³⁺       iron(III)             ferric
    As³⁺      arsenic(III)         arsenous
    As⁵⁺      arsenic(V)          arsenic
 

Binary Salts (ionic)

Al₂S₃      aluminum sulfide
Na₂O    sodium oxide
CaCl₂    calcium chloride
FeS        iron(II) sulfide or ferrous sulfide
Fe₂S₃    iron(III) sulfide or ferric sulfide
TiBr₃     titanium(III) bromide

Binary Covalent Compounds

CCl₄       carbon tetrachloride

N2O       dinitrogen monoxide

N₂O₃       dinitrogen trioxide

S₂Cl₂      disulfur dichloride

P₄S₆        tetraphosphorus hexasulfide

H₂O         water

NH₃           ammonia

H₂O₂        hydrogen peroxide
 

Polyatomic ions

hypo-ite                   ite                     ate                 per-ate

                               NO2^-                      NO₃^-

                              SO₃^2-                      SO₄^2-

                              PO₃^3-                       PO₄^3-

        ClO^-                  ClO₂^-                  ClO₃^-                  ClO₄^-

                                                                               MnO₄^-

Additional Polyatomic Ions

NH₄⁺ ammonium

CO₃^2- carbonate

HCO₃^- bicarbonate

hydrogen carbonate

HPO₄^2- hydrogen phosphate

H₂PO₄^- dihydrogen phosphate

C₂H₃O₂^- acetate

OH^- hydroxide

CN^- cyanide

H₃O⁺ hydronium

Ternary Salts (ionic)

(NH₄)₂O ammonium oxide

Al₂(SO₄)₃ aluminum sulfate

Fe(NO₂)₂ iron(II) nitrite

Fe(NO₂)₃ iron(III) nitrite

Fe(NO₃)₂ iron(II) nitrite

Fe(NO₃)₃ iron(III) nitrite

NaHSO₃ sodium bisulfite

Binary acids

hydro-ic acid

HCl(aq) hydrochloric acid

H₂S(aq) hydrosulfuric acid

HF(aq) hydrofluoric acid

HCl(g) hydrogen chloride

H₂S(g) hydrogen sulfide

Ternary Acids

ite --> ous acid

ate --> ic acid

HNO₂(aq) nitrous acid

HNO₃(aq) nitric acid

H₃PO₄(aq) phosphoric acid

HClO(aq) hypochlorous acid

HClO₂(aq) chlorous acid

HClO₃(aq) chloric acid

HClO₄(aq) perchloric acid

HC₂H₃O₂(aq) acetic acid

Bases

NaOH(aq) sodium hydroxide

NH₄OH(aq) ammonium hydroxide

Mg(OH)₂(aq) magnesium hydroxide

Co(OH)₂(aq) cobalt(II) hydroxide

Ni(OH)₂(aq) nickel(II) hydroxide

Miscellaneous

SO₄^2- sulfate, S₂O₃^2- thiosulfate

OCN^- cyanate, SCN^- thiocyanate

CuSO₄^. 5 H₂O

copper(II) sulfate pentahydrate