Across
- 1. A column on the periodic table
- 4. protons and neutrons
- 6. make or produce
- 7. Number of protons
- 9. dissolvable
- 10. A pure substance made of only one kind of atom
Down
- 2. A substance produced in a chemical reaction
- 3. flexible
- 5. A homogeneous mixture
- 8. Basic unit of matter