Learn names and formulas of all important inorganic acids, polyatomic ions and their salts. An app is suitable for everyone: from high school students to chemistry professors. Take a quiz or use the table as a reference. * 70+ inorganic acids: from Sulfuric H2SO4 to Hydrazoic HN3. * 50+ anions and cations: from Chloride Cl(-) to Hydrazinium N2H5(+). * 50+ salts: from Potassium nitrate KNO3 to Ammonium hexachloroplatinate (NH4)2PtCl6. Choose the game mode: * Spelling quizzes. * Multiple-choice