Across
- 3. What is right of the staircase?
- 5. Created Lewis dot diagram
- 9. What is left of the staircase?
- 10. Have same atomic # but different mass #
- 11. Is neutral and inside nucleus
- 12. Shortened for the name of an element
- 13. Created model of an atom
- 14. The number o protons in the nucleus of the atom is called...
Down
- 1. Located around nucleus
- 2. Created element classifications.
- 4. Average mass of atoms in an element
- 6. Discovered atoms had a nucleus
- 7. What is the staircase?
- 8. Is positive located inside nucleus