Across
- 3. The part of an atom with a negative charge
- 4. The part of an atom with a positive charge
- 5. The element with the atomic number 1
- 7. A combination of multiple atoms or elements that are mixed together to make a new substance
- 8. The pieces that make up an atom
- 11. Chemical formula for water
- 12. The part of an atom with a neutral charge
- 13. The center of an atom
Down
- 1. A material used to make cans
- 2. A radioactive element featured in the hit movie "Back to the Future"
- 6. The bond between multiple atoms
- 9. number 88 The chemical number for Radium
- 10. A radioactive element discovered by Marie Curie