Across
- 3. tiny things that makes up everything
- 5. two compounds mixed
- 7. sum of protons and neutrons in a nucleus
- 9. has no charge
Down
- 1. the center of an atom
- 2. has a positive charge
- 3. number can be found on top left of box
- 4. a group of bonded atoms
- 6. goes around the nucleus with a negative charge
- 8. table a table showing elements found on earth