Across
- 3. has a positive charge
- 5. has a neutral charge
- 7. created the periodic table
- 8. number of protons and neutrons
- 10. has negative
Down
- 1. groups
- 2. periods
- 4. number of protons
- 6. to represent something in 3d
- 9. made up of protons, electrons, and neutrons