I realize there's a big hole in my understanding here but gold doesn't make sense to me. I understand that noble gasses are non-reactive because their outer electron shells are totally full (I may be wrong there but that's always been my understanding). However, gold is also nonreactive but it has 6 electrons in its outer shell. Oxygen also has 6 electrons in its outer shell, but we all know oxygen is reactive af, so why is gold so ace-coded? Why is oxygen such a freak in the sheets? What other factor(s) dictate the reactivity of an element? #education source