Awww....that was the best laugh I've had in days. How can anyone trust anything that man writes when he doesn't even know the basics of the sub-atomic structure of elements? Might it be that calcium protons different from magnesium protons, are they different from lead or oxygen protons? Must we rewrite all the chemistry books just like we did the human physiology books? Talk about being educated beyond your intelligence; I finally understand what that phrase "may" mean.