Common Cations & Anions

Monatomic Cations (Group 1 elements)

Alkali metals from “1+” cations: Na+, K+, Rb +, Cs+

Monatomic Cations (Group 2 elements)

Alkaline earth metals form “2+” cations: Mg 2+, Ca 2+, Sr 2+, Ba 2=

Polyatomic Cations

H30+ (Hydronium)

Polyatomic Cations

Nh4+ (ammonium)

Monatomic Anions (Group 15 elements)

Form “3-” anions: N³- (nitride), P³- (phosphide)

Monoatomic Anions (Group 16 Elements)

Form “2-” anions: O²- (oxide), S²- (sulfide)

Monoatomic Anions (Group 17 Elements Halogens)

Form “1-” anions: F- (fluoride), Cl- (chloride), Br- (bromide), and I- (iodide)

OH-

Hydroxide

O2²-

Peroxide

CN-

Cyanide

Co3²-

Carbonate

C2H3O2-

Acetate

NO3-

Nitrate

No2-

Nitrite

SO4²-

Sulfate

So3²-

Sulfite

PO4³-

Phosphate

PO3³-

Phosphite

CrO4²-

Chromate

Cr2O7

Dichromate

MnO4-

Permanganate

ClO4-

Perchlorate

ClO3-

Chlorate

ClO2-

Chlorite

ClO-

Hypochlorite

BrO4-

Perbromate

BrO3-

BromateB

BrO2-

Bromite

BrO-

Hypobromite

IO4-

Periodate

IO3-

IodateIO

IO2-

Iodite

IO-

Hypoiodite