How do polyatomic ions differ from monatomic ions?

1 Answer
Jun 23, 2018

Answer:

By the number of atoms present in the ion.

Explanation:

Monoatomic ions are ions that consist of single atom . For example:
potassium ion, #K^"+"#
magnesium ion, #Mg^"2+"#
aluminum ion, #Al^"3+"#
nitride ion, #N^"3-"#
oxide ion, #O^"2-"#

Polyatomic ions are ions that consist of a cluster of atoms (more than one bonded to each other). For example:
ammonium ion, #NH_4^"+"#
carbonate ion, #CO_3^"2-"#
nitrate ion, #NO_3^"-"#
cyanide ion, #CN^"-"#