Ions to Memorize DFA

Group 1 (full name)

1+

Group 2 (full name)

2+

Group 13 (full name)

3+

Group 14 (full name OR root+ide)

4+ or 4-

Group 15 (root+ide)

3-

Group 16 (root+ide)

2-

Group 17 (root+ide)

1-

Copper (I, II)

Cu⁺ and Cu²⁺

Chromium (III, VI)

Cr³⁺, Cr⁶⁺

Iron (II, III)

Fe²⁺ and Fe³⁺

Lead (II, IV)

Pb²⁺ and Pb⁴⁺

Manganese (II, IV, VII)

Mn²⁺, Mn⁴⁺, Mn⁷⁺

Mercury (I, II)

Hg₂²⁺, Hg²⁺

Silver

Ag⁺

Tin (II, IV)

Sn²⁺ and Sn⁴⁺

Zinc

Zn²⁺

Ammonium

NH₄⁺

Acetate

C₂H₃O₂⁻ (or CH₃COO⁻)

Carbonate

CO₃⁻²

Hydrogen Carbonate (Bicarbonate)

HCO₃⁻

Perchlorate

ClO₄⁻

Chlorate

ClO₃⁻

Chlorite

ClO₂⁻

Hypochlorite

ClO⁻

Chromate

CrO₄²⁻

Dichromate

Cr₂O₇²⁻

Cyanide

CN⁻

Thiocyanate

SCN⁻

Hydride

H⁻

Hydroxide

OH⁻

Nitrate

NO₃⁻

Nitrite

NO₂⁻

Permanganate

MnO₄⁻

Manganate

MnO₄²⁻

Peroxide

O₂²⁻

Phosphate

PO₄³⁻

Hydrogen Phosphate

HPO₄²⁻

Dihydrogen Phosphate

H₂PO₄⁻

Sulfate

SO₄²⁻

Hydrogen Sulfate (Bisulfate)

HSO₄⁻

Sulfite

SO₃²⁻

Hydrogen Sulfite (Bisulfite)

HSO₃⁻

-ate ions

(root)ic acids

-ite ions

(root)ous acids

Roman numeral

charge on ion

Oxalate

C₂O₄²⁻

Thiosulfate

S₂O₃²⁻

Iodate

IO₃⁻

Bromate

BrO₃⁻

-ide ions

hydro(root)ic acids