Step-by-step explanation:
A polyatomic ion refers to an ion that contains more than one atom.
Potassium Bicarbonate contains the Potassium ion and bicarbonate ion.
The formula is given as; KHCO₃
Aluminium Phosphate contains the Aluminium ion and Phosphate ion.
The formula is given as; AlPO4
Copper(II)hydroxide contains copper ion and hydroxide ion.
The formula is given as; Cu(OH)₂