Common Ions and Their Formulas

A set of vocabulary flashcards mapping names of monatomic and polyatomic cations and anions to their corresponding chemical formulas.

Hydrogen ion

$$H^+$$

Lithium ion

$$Li^+$$

Sodium ion

$$Na^+$$

Potassium ion

$$K^+$$

Rubidium ion

$$Rb^+$$

Cesium ion

$$Cs^+$$

Beryllium ion

$$Be^{2+}$$

Magnesium ion

$$Mg^{2+}$$

Calcium ion

$$Ca^{2+}$$

Strontium ion

$$Sr^{2+}$$

Barium ion

$$Ba^{2+}$$

Radium ion

$$Ra^{2+}$$

Aluminum ion

$$Al^{3+}$$

Chromium(III) ion

$$Cr^{3+}$$

Manganese(II) ion

Mn2+

Iron(II) ion

Fe2+

Iron(III) ion

$$Fe^{3+}$$

Cobalt(II) ion

$$Co^{2+}$$

Nickel(II) ion

Ni2+

Copper(I) ion

$$Cu^+$$

Copper(II) ion

Cu2+

Silver ion

$$Ag^+$$

Zinc ion

$$Zn^{2+}$$

Cadmium ion

$$Cd^{2+}$$

Mercury(I) ion

$$Hg_2^{2+}$$

Mercury(II) ion

$$Hg^{2+}$$

Lead(II) ion

$$Pb^{2+}$$

Ammonium ion

$$NH_4^+$$

Hydride ion

$$H^-$$

Fluoride ion

$$F^-$$

Chloride ion

$$Cl^-$$

Bromide ion

$$Br^-$$

Iodide ion

$$I^-$$

Triiodide ion

$$I_3^-$$

Oxide ion

$$O^{2-}$$

Peroxide ion

$$O_2^{2-}$$

Sulfide ion

$$S^{2-}$$

Nitride ion

$$N^{3-}$$

Phosphide ion

$$P^{3-}$$

Hydroxide ion

$$OH^-$$

Cyanide ion

$$CN^-$$

Thiocyanate ion

$$SCN^-$$

Phosphate ion

$$PO_4^{3-}$$

Hydrogen phosphate ion

$$HPO_4^{2-}$$

Dihydrogen phosphate ion

$$H_2PO_4^-$$

Carbonate ion

$$CO_3^{2-}$$

Hydrogen carbonate ion (bicarbonate ion)

$$HCO_3^-$$

Sulfate ion

$$SO_4^{2-}$$

Hydrogen sulfate ion (bisulfate ion)

$$HSO_4^-$$

Sulfite ion

$$SO_3^{2-}$$

Hydrogen sulfite ion (bisulfite ion)

$$HSO_3^-$$

Thiosulfate ion

$$S_2O_3^{2-}$$

Nitrate ion

$$NO_3^-$$

Nitrite ion

$$NO_2^-$$

Perchlorate ion

$$ClO_4^-$$

Chlorate ion

$$ClO_3^-$$

Chlorite ion

$$ClO_2^-$$

Hypochlorite ion

$$ClO^-$$

Permanganate ion

$$MnO_4^-$$

Chromate ion

$$CrO_4^{2-}$$

Dichromate ion

$$Cr_2O_7^{2-}$$

Acetate ion

$$C_2H_3O_2^-$$

Oxalate ion

$$C_2O_4^{2-}$$