Question

what are poly atomic ions? two examples​

Answer 1

Answer:

Polyatomic ions are ions which consist of more than one atom. For example, nitrate ion, NO3-, contains one nitrogen atom and three oxygen atoms. The atoms in a polyatomic ion are usually covalently bonded to one another, and therefore stay together as a single, charged unit.

Example:- Cr2O7^2- .

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Answer 2

Answer:

A group of ions carrying a charge is called a poly atomic ion. For egNO3- and SO4-