Make your Chemistry Life Easier—Know these Ions!!

All group I and II monatomic cations

e.g., Na⁺ (sodium ion) or Ca²⁺ (calcium ion)

All group VII monatomic anions

e.g., Cl^- (chloride ion)

NH₄⁺ (ammonium ion) Learn to distinguish

this from the ammonia molecule!

O^2- (oxide ion)

S^2-(sulfide ion)

OH^- (hydroxide ion)

CN^-(cyanide ion)

Also be able to use the Stock (Roman numeral)

system for naming cations (e.g., Cu⁺ is copper (I))

SO₃^2-(sulfite ion)

SO₄^2- (sulfate ion)

NO₃^- (nitrate ion)

NO₂^- (nitrite ion)

C₂H₃O₂^- (acetate ion)

CO₃^2- (carbonate ion)

HCO₃^- (hydrogen carbonate or bicarbonate ion)

PO₄^3- (phosphate ion)

HPO₄^2- (monohydrogen phosphate ion)

H₂PO₄^- (dihydrogen phosphate ion)

ClO₄^- (perchlorate ion)

ClO₃^- (chlorate ion)

ClO^- (hypochlorite ion)