Nomenclature

Unit 6 - Bonding

Types of Ions

• Monatomic = 1 atom– Representative elements TYPICALLY have

only one possible charge

Names– Cations = name of the element

• Ca2+ = Calcium ion

– Anions = remove ending, add “–ide”• N3- = Nitride

Types of Ions

• Transition metals and some representative elements have more than one charge.

• There are two ways to name these elements…

Fe2+, Fe3+

Cu+, Cu2+

Sn2+, Sn4+

Pb2+, Pb4+

These Transition Metals only have

ONE charge!!!

Ag+

Zn2+

Types of Ions

• Stock System – Element name with charge in parentheses

(Roman Numerals)• Copper (I) = Cu+

• Latin System – Latin root + suffix

• - ous = Lower charge• - ic = Higher charge

– Ferric and Ferrous

Types of Ions

• Polyatomic Ions = A charged GROUP of bonded atoms– Acts as ONE UNIT in an ionic bond

• Cations: Only NH4+

• Anions: More common as polyatomics– Look at the back of the periodic table!!

Naming Ionic Compounds

• Cation is always named first (No # prefixes)

• Cation take the name of the element– Transition metals use the anion to find the

charge of the cation • (Roman numeral = charge)

• Anion– Monatomic end in –ide– Polyatomic name from chart

Naming

• Practice…..Practice…..Practice

• CaF2

– calcium fluoride

• Li2S

– Lithium sulfide

• FeCl2– Iron (II) chloride

• FeCl3– Iron (III) chloride

Naming

• PtO2

– Platinum (IV) oxide

• CuBr– Copper (I) bromide

• Zn3N2

– Zinc (II) nitride (Zn is +2)

• Sn3P2

– Tin (II) phosphide

Naming

• Ternary:

• Ca(OH)2

– Calcium hydroxide• NaSCN

– Sodium thiocyanate

• Al2(CrO4)3

– Aluminum chromate

• Mg(NO2)2

– Magnesium nitrite

Naming

• NH4Cl

– Ammonium chloride

• Au2(CO3)3

– Gold (III) carbonate

• Pb(CN)4

– Lead (IV) cyanide

• FePO4

– Iron (III) phosphate