Welcome to The Happy Atom Story-Book 3. If you've read Books 1 and 2 you know that Guy's adventures in Periodic Table Land are woven into a fantasy tale. It's the silly electrons, the proper protons and the dear little atoms who help Guy learn about the Periodic Table, the structure of the atom, and the Chemical Families. As Book 2 ends, we discover that the elements are incredibly sad with tears running down their dear little atom faces. Sodium's...