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 investigation to find a way to make them happy ends successfully on 8th Street where he discovers a whole family of Happy Atoms, the Noble Gases. The secret is -atoms are happy when their Outside Energy Level is complete with the right number of electrons. In this book the little atoms discover that something spectacular happens when they become happy. They become a new creation, a compound. Word soon spreads to all the Chemical Families in Periodic Table Land. Then, there is no stopping them. As you read Book 3 you'll discover the many ways the elements find to form compounds. Climb into the magic bubble and become invisible with Professor Terry and Guy. Swoop off to 7th Street and watch the Alkali Metals form the first Happy Atom ever with the Halogens. See their smiles as they finally become happy. Observe why compounds need an exact number of atoms to make a compound. Note the elements get a new name and a formula when they become a compound. Be there when Guy excitedly discovers the meaning of water's formula, H2O. Before the book ends Guy learns the Valence Method and discovers how easy it is to write chemical formulas. You will too. Let the Happy Atoms get you excited about chemistry. Read, enjoy and learn!