Across
- 4. a combination
- 6. in the middle
- 8. opposite of positive
- 9. opposite of negative
- 11. number of protons and neutrons
- 12. positive charge
- 14. in the middle of positive and negative
Down
- 1. number of electrons
- 2. makes up molecules
- 3. made up of atoms
- 5. neutral charge
- 7. has many elements
- 10. on the periodic table
- 13. negative charge