Across
- 2. Outermost electrons
- 6. Everything consists of this
- 9. Incorrect early model for the energy levels
- 11. Identity of an atom
- 12. No charge
Down
- 1. Number of protons
- 3. Where electrons are found
- 4. Parts of an atom
- 5. Number of protons and neutrons combined
- 7. Rows across the periodic table
- 8. Negative charge
- 10. Center of atom