Across
- 3. Proven
- 5. Plum Pudding
- 7. Number of protons
- 8. To represent a concept
- 14. Not proven, but a ___
- 15. Nuclear
- 16. Bryan Cranston
- 17. Center/Core
- 18. Negative
- 19. Quantitative Measure
- 20. Positive
Down
- 1. Cannot be broken down by non-nuclear methods
- 2. Planetary
- 4. Two or more elements
- 6. Unit of an element
- 7. Two protons, two neutrons
- 9. Quantum Mechanical
- 10. Billiard ball
- 11. In order to prove something, I must perform a ___
- 12. Atomic Model
- 13. Isotope minus Protons