1. The problem statement, all variables and given/known data I have a test coming up and some of the practice questions were things like "Name 6 elements with a maximum oxidation state of +7" or some other number like +8, +6, etc. How do I go about doing this? 3. The attempt at a solution There is the obvious trick of counting valence electrons, but past that how do I figure stuff like this out? How do i know which noble gases have what oxidation states? I already have to memorize the periodic table for this test, I'd hate to have to memorize all the random oxidation states of elements too.