Ionic Compound Nomenclature

Nomenclature – naming and formula writing of chemical compounds

Ionic Nomenclature Ionic bonding occurs between…

a metal & a non-metal To name an ionic compound:

name the metal name the non-metal, adding an –ide ending

name the cation, name the anion

Ionic Nomenclature For example… CaCl2

forms from: the calcium ion, Ca2+

and the chloride ion, Cl- So, the name of CaCl2 is calcium chloride.

Ionic Nomenclature

1. MgO

2. Al2O3

3. Rb3P

magnesium oxide

rubidium phosphide

aluminum oxide

Ionic Nomenclature To write formulas for an ionic compound, determine

what charge is on the metal ion and what charge is on the non-metal ion.

Then, determine the formula, so that the compound is neutral (the ‘criss-cross’ method may be useful in determining the formula)

Ionic Nomenclature For example… magnesium bromide is made up of

magnesium ions (Mg2+), and bromide ions (Br-) Mg2+ Br- So, the formula is MgBr2

Ionic Nomenclature

1. sodium chloride

2. barium fluoride

3. potassium sulfide

4. magnesium phosphide

5. calcium oxide

(try some more…)

Type II Ionic Nomenclature

What is the name of:FeS?Fe2S3?AuF?AuF3?

Type II CationsCu+ copper(I) cuprousCu2+ copper(II) cupricFe2+ iron(II) ferrousFe3+ iron(III) ferric Sn2+ tin(II) stannousSn4+ tin(IV) stannicCr2+ chromium(II) chromousCr3+ chromium(III) chromicMn2+ manganese(II) manganousMn3+ manganese(III) manganicHg2

2+ mercury(I) mercurousHg2+ mercury(II) mercuricPb2+ lead(II) plumbousPb4+ lead(IV) plumbicCo2+ cobalt(II) cobaltousCo3+ cobalt(III) cobalticAu+ gold(I) aurousAu3+ gold(III) auricNi2+ nickel(II) nickelousNi3+ nickel(III) nickelic

Type II Ionic NomenclatureWhat is the formula of:

copper(II) bromide?

plumbous chloride?

lead(IV) oxide?

chromium(III) sulfide?

manganic selenide?

Type II Ionic Nomenclature

What is the name of:

FeS

Fe2S3

AuF

AuF3

Pb2S3