1.What force holds together atoms in compounds? 2. Name a gas that consists of two atoms of the same element bonded together. Do the molecules of this gas represent a compound? Why or why not?

3. Identify at least one property of water that differs from the properties of the elements that form it.

4. Which two elements make up the compound named butane? What is the ratio of these two elements in butane? How would you use chemical symbols to represent butane?

5.What is an element?

6.How much is gold worth today?

7.How many elements did we know about when Tom Lehrer wrote his song?