So the rules that I'm working with have exceptions, it just sucks that when these things come up in my books, they leave me wondering if its an error, or correct, but it turns out being an 'exception' to the rule, though they don't explain it.
Okay, so will Mg always come out as, 2 Mg, 3 Mg, 4 Mg, etc?
Or can Mg form a molecule of Mg3? (Knowing now that it can't form a molecule of Mg2)