WALZ POLYATOMIC IONS

Hg2 2+

Mercury (I)

NH4+

Ammonium

NO2-

Nitrite

NO3-

Nitrate

SO3 2-

Sulfite

SO4 2-

Sulfate

CO3 2-

Carbonate

OH-

Hydroxide

CN-

Cyanide

PO4 3-

Phosphate

SCN- (or NCS-)

Thiocyanate

ClO- or OCl-

Hypochlorite

ClO2-

Chlorite

ClO3-

Chlorate

ClO4-

Perchlorate

C2H3O2- or CH3COO-

Acetate

MnO4-

Permanganate

Cr2O7 2-

Dichromate

CrO4 2-

Chromate

O2 2-

Peroxide

C2O4 2-

Oxalate

S2O3 2-

Thiosulfate

Column 1A metals

Make a 1+ (name the ion the same as the element)

Column 2A metals

Make a 2+ (name the ion the same as the element)

Column 3A metals

Make a 3+ (name the ion the same as the element)

N 3- (column 5A needs 3 electrons for an octet, so it's more common for 5A to make a 3- charge)

Nitride

O 2- and S 2- (6A needs 2 electrons, making a 2- charge)

Oxide and Sulfide

Column 7A nonmetals

Make a 1- charge —change suffix to -ide when naming

Zinc is always a 2+ ion (Zn 2+)

Silver is always a 1+ ion (Ag+)

BrO3-

Bromate

BrO2-

Bromite

NO2-

Nitrite

NO3-

Nitrate

Phosphate

PO4³-

Phosphide

P³-