In most of the cases it is true but SCN- , Transition metals complex ions and some organic poly atomic ions do not contain oxygen.
Ionic compounds ammonium sulfate, has both a polyatomic cation NH4+ and polyatomic anion, SO42-
Salts are ionic. If they contain polyatomic ions,(e.g. NH4+ , SO42-.) There are covalent bonds inside these ions.
The ammonium ion, NH4+, and the nitrate ion, NO3-.
Compounds with both ionic and covalent bonds contain polyatomic ions.
Rubidium triiodide = RbI3It can also be written as Rb[I3]
Oxygen
Polyatomic ions ending in -ate in common form contain oxygen.
Yes. Mg2+ is a monatomic ion, but SO42- is a polyatomic ion composed of two elements, sulfur and oxygen.
Ionic compounds ammonium sulfate, has both a polyatomic cation NH4+ and polyatomic anion, SO42-
These are called polyatomic ions.
polyatomic
Ions made up of more than one atom are called polyatomic ions.
Salts are ionic. If they contain polyatomic ions,(e.g. NH4+ , SO42-.) There are covalent bonds inside these ions.
The ammonium ion, NH4+, and the nitrate ion, NO3-.
Cations are positive ions (Fe2+, NH4+).Anions are negative ions (Cl-, (SO4)2-).Fe2+ is a monoatomic ion and (NH4)+ is a polyatomic Ion (contain more than one element).
Examples: oxygen, sulfur, carbon, phosphorus etc.
No. Most polyatomic ions are anions.