Posted: Jun 18, 2013 2:52 pm
by The_Metatron

She's up against her first problems, and it involves oxidation numbers. I have no memory of this from high school chemistry, but it sounds suspiciously like what I would call valence numbers. On page 121 of our chemistry book, there was a table of the elements along with their valence charges. +1. +2. -2, etc. It had to do with how complete was the outermost shell of electrons.

I'm going to read the relevant chapter of her text tonight and see if it rings bells.