Question

How is naming a polyatomic ion different from naming a binary compound?

Answer 1

It's not really that much different. You name the positive ion first, then name the polyatomic ion second.

Here is a quick review of naming a binary ionic compound.

Here is a video which discusses how to name ternary ionic compounds. Video from: Noel Pauller

Naming binary molecular compounds is an entirely different process.

Hope this helps!