positively charged ions are called cations (named first)

Positively charged ions are called Positively charged ions are called cationscations (named first)(named first)

Negatively charged ions are called Negatively charged ions are called anionsanions Cations can be metals or polyatomic ions Cations can be metals or polyatomic ions

– For metals that have only one possible charge For metals that have only one possible charge (valency) the name of the metal is used.(valency) the name of the metal is used.Examples are Group I metals (charge 1+), Examples are Group I metals (charge 1+), Group II metals (charge 2+), Aluminium Group II metals (charge 2+), Aluminium (charge 3+), Zinc (charge 2+), Silver (charge (charge 3+), Zinc (charge 2+), Silver (charge 1+) 1+)

– For metals that can have more than one For metals that can have more than one charge (valency) the name of the metal is charge (valency) the name of the metal is succeeded by the valency in capital Roman succeeded by the valency in capital Roman numerals in bracketsnumerals in bracketsORORby using the suffix -ous for the lowest valency by using the suffix -ous for the lowest valency and -ic for the highest valency and sometimes and -ic for the highest valency and sometimes with the Latin name for the metalwith the Latin name for the metal

Anions can be a negatively charged element Anions can be a negatively charged element or a polyatomic ion or a polyatomic ion

– Negatively charged elements have the suffix -ideNegatively charged elements have the suffix -ideExamples are oxide (OExamples are oxide (O2-2-), sulfide (S), sulfide (S2-2-), fluoride ), fluoride (F(F--), chloride (Cl), chloride (Cl--), bromide (Br), bromide (Br--), iodide (I), iodide (I--), ), nitride (Nnitride (N3-3-), hydride (H), hydride (H--) )

– Polyatomic ions which include oxygen in the Polyatomic ions which include oxygen in the anion have the suffixes -ate or -ite. "ate" means anion have the suffixes -ate or -ite. "ate" means there is more oxygen in the anion than one there is more oxygen in the anion than one ending in "ite"ending in "ite"Examples: sulfate (SOExamples: sulfate (SO44

2-2-) has more oxygen than ) has more oxygen than sulfite (SOsulfite (SO33

2-2-), nitrate (NO), nitrate (NO33--) has more oxygen in ) has more oxygen in

the anion than nitrite (NOthe anion than nitrite (NO22--))

Other examples are carbonate (COOther examples are carbonate (CO332-2-), ),

phosphate (POphosphate (PO443-3-) and permanganate (MnO) and permanganate (MnO44

--))Exception: OHException: OH-- is named hydroxide is named hydroxide

MgOMgO

CATION: MgCATION: Mg2+2+ is named magnesium as is named magnesium as magnesium belongs to Group (II) and magnesium belongs to Group (II) and can only have one charge (valency)can only have one charge (valency)ANION: OANION: O2-2- is named oxide is named oxideName of compound is magnesium oxideName of compound is magnesium oxide

FeSFeS

CATION: FeCATION: Fe2+2+ is named iron (II) or is named iron (II) or ferrous as iron can have a charge of ferrous as iron can have a charge of either 2+ or 3+either 2+ or 3+ANION: SANION: S2-2- is named as sulfide is named as sulfideName of compound is iron (II) sulfide Name of compound is iron (II) sulfide or ferrous sulfideor ferrous sulfide

LiHLiH

CATION: LiCATION: Li++ is named as lithium since is named as lithium since lithium is a Group I metal and can lithium is a Group I metal and can have only one charge (valency)have only one charge (valency)ANION: HANION: H-- is named as hydride is named as hydrideName of compund is lithium hydrideName of compund is lithium hydride

CaCOCaCO33

CATION: CaCATION: Ca2+2+ is named as calcium is named as calcium (since it is a Group II metal) and can (since it is a Group II metal) and can only have 1 chargeonly have 1 chargeANION: COANION: CO33

2-2- is named as carbonate is named as carbonateName of compound is calcium Name of compound is calcium carbonatecarbonate

FeSOFeSO44

CATION: FeCATION: Fe2+2+ named as iron (II) or named as iron (II) or ferrousferrousANION: SOANION: SO44

2-2- named as sulfate named as sulfate

FeSOFeSO33

CATION: FeCATION: Fe2+2+ named as iron (II) or named as iron (II) or ferrousferrousANION: SOANION: SO33

2-2- named as sulfite named as sulfiteName of compound is iron (II) sulfite Name of compound is iron (II) sulfite or ferrous sulfiteor ferrous sulfite

Guided PracticeGuided Practice

Ca ICa I22 = =


CaCa+2+2 I I22-1 -1 = =


CaCa+2+2 I I22-1 -1 = CaI= CaI22


CaCa+2+2 I I22-1 -1 = CaI= CaI22 Calcium Iodide Calcium Iodide


NaNa22+1+1

CO CO33-2 -2 = =


NaNa22+1+1

CO CO33-2 -2 = Na = Na22(CO(CO33))


NaNa22+1+1

CO CO33-2 -2 = Na = Na22(CO(CO33) )

= Sodium Carbonate= Sodium Carbonate


Cu FCu F22 = =


CuCu+2 +2 F F22 -1-1 = =


CuCu+2 +2 F F22 -1-1 = CuF = CuF22 Copper (II) FluorideCopper (II) Fluoride


Fe SOFe SO44= =


Fe Fe +2+2 SO SO44-2-2==


Fe Fe +2+2 SO SO44-2 -2 = Fe (SO= Fe (SO44))


Fe Fe +2+2 SO SO44-2 -2 = Fe (SO= Fe (SO44))

= Iron (II) Sulfate= Iron (II) Sulfate


Iron (III) Oxide = Iron (III) Oxide =


Iron (III) Oxide = FeIron (III) Oxide = Fe+3+3 O O-2-2



== Fe Fe22 (Total of +6 (Total of +6 charge)charge)



== Fe Fe22OO33


Copper (II) Chloride =Copper (II) Chloride =


Copper (II) Chloride = CuCopper (II) Chloride = Cu+2 +2 ClCl-1-1


Copper (II) Chloride = CuCopper (II) Chloride = Cu+2 +2 ClCl-1-1

== CuCl CuCl22


Ga (ClOGa (ClO33))33 = =


Ga (ClOGa (ClO33))33 -1-1 = =


GaGa+3+3 (ClO (ClO33))33 -1-1 = Ga (ClO = Ga (ClO33))33


GaGa+3+3 (ClO (ClO33))33 -1-1 = Ga (ClO = Ga (ClO33))33

= Gallium Chlorate= Gallium Chlorate


(NH(NH44))3 3 (PO (PO44) )


(NH(NH44))3 3 +1+1

(PO (PO44) ) -3-3


(NH(NH44))3 3 +1+1

(PO (PO44) ) -3 -3 = (NH= (NH44))3 3 (PO(PO44) )


(NH(NH44))3 3 +1+1

(PO (PO44) ) -3 -3 = (NH= (NH44))3 3 (PO(PO44))

= Ammonium = Ammonium Phosphate Phosphate


Mg (NOMg (NO33))2 2 = Magnesium Nitrate= Magnesium Nitrate

= Mg (NO= Mg (NO33))2 2

positively charged ions are called cations (named first)

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