Across
- 1. Every compound has a ____
- 5. Democritus called his tiny pieces of matter.
- 6. A substance made up of just one kind of atom.
- 8. A group of atoms joined together.
- 9. Metal Mixtures
Down
- 2. something that contains two or more substances that are not combined chemically.
- 3. An alloy made up of copper and tin.
- 4. Mg
- 7. Useful way of arranging the elements.