What do a group of ions form

Its for a project..thanks!!

ions can get together to form a polyatomic ion

or they can join to form a compound. Remember that a compound does not have a charge, so it needs the right number of + ions to balance the - ions

depends upon a lot of factors like elment forming the ion, bonding ability of the ions,
as you ask it, a group of ions = a group of ions. unless you specify what ions are present and under what conditions, you just have a group of ions