It's been a week since I posted! Yikes!
Yesterday a student asked me about an ion. It was [Cu(OH2)6]2+, and I had never seen it before. Besides that, I never quite understood coordination chemistry. So, a Google search brought me to a page that said:
"Note: If you aren't happy about complex ions (including the way they are bonded and named), it would pay you to follow this link and explore the first couple of pages in the complex ions menu before you go on."
So I followed that advice and found this site:
I thought I'd pass it on.