Yes. Mg2+ is a monatomic ion, but SO42- is a polyatomic ion composed of two elements, sulfur and oxygen.
hydrogen carbonate (aka bicarbonate) is the polyatomic ion you're looking for. Mg(HCO3)2 Mg2+ (HCO3)-
Magnesium sulfate (MgSO4) dissociates into magnesium ions (Mg^2+) and sulfate ions (SO4^2-) in solution.
Except chloride, all others are polyatomic ions.
No, NaCO3 is not a polyatomic ion. NaCO3 is the formula for sodium carbonate, which is a compound composed of sodium ions (Na+) and carbonate ions (CO3 2-). The carbonate ion (CO3 2-) is a polyatomic ion.
No, ammonium is not an oxyanion. It is a polyatomic cation composed of one nitrogen atom and four hydrogen atoms, with a net positive charge. Oxyanions are negatively charged ions that contain oxygen.
Elements do not contain polyatomic ions. Examples of substances that do not contain polyatomic ions include water (H2O), sodium chloride (NaCl), and oxygen gas (O2).
In most of the cases it is true but SCN- , Transition metals complex ions and some organic poly atomic ions do not contain oxygen.
Oxygen
SO4
The ammonium ion, NH4+, and the nitrate ion, NO3-.
NO3 -
Compounds that contain polyatomic ions include salts such as sodium nitrate (NaNO3) and calcium carbonate (CaCO3), as well as acids like sulfuric acid (H2SO4) and phosphoric acid (H3PO4). These compounds are formed when polyatomic ions combine with other ions or atoms to create a stable compound.
These are called polyatomic ions.
polyatomic
Polyatomic ions with the suffix -ate typically contain one or more oxygen atoms. These ions often form from the combination of a central atom with oxygen and other elements, creating a negatively charged ion with a specific overall charge.
Compounds like sodium chloride (NaCl), methane (CH4), and water (H2O) do not contain polyatomic ions. These compounds are formed from simple combinations of individual elements without the presence of complex ions.
Ions made up of more than one atom are called polyatomic ions.