An -ate or -ite at the end of a compound name usually indicates that the compound contains .?

Polyatomic Anion
Oxigen. If a compound has name containing ending with -ite or -ate always contains Oxigen.
-ite indicates three or less atoms in the compound. But it usually contain less than three oxigen atom.
ex: SO3^2- sulfite ion, NO2- nitrite ion
-ate indicates three or more oxigen atoms contained in the compound
ex:ClO3- chlorate ion.
Oxygen in the form of a polyatomic anion.