Question

"Part A: Most of the transition metals form brightly colored ionic substances. Which elements located in the first row transition metals cannot form ionic compounds? Explain.

Part B: Explain why representative metals do not form colored compounds."

I am not sure but maybe part A is something like this: first row transition metals can lose electrons to create ions of several different charges. Since (for example) one specific transition metal element may form a 2+, 3+, or 4+ charged cation, they may lose different numbers of electrons (each ((each atom))) so they do not form ionic compounds...how does this sound?
I do not know part B though..
thank you very much