Across
- 2. the scientist who invented the "Billiard Ball Mode"
- 4. same element, different mass
- 6. an atom with lost or gained electrons
- 9. chemist that discovered the orbital model
- 13. The scientist that discredited Leucippus and Democritus
- 14. Subatomic particle with a negative charge
- 15. drop experiment to find charge and mass of the electron
- 17. rejected the idea of only four elements
- 18. the sum of protons and neutrons on the periodic table
- 19. substance that cannot be broken down into a smaller substance
Down
- 1. means atom in greek
- 3. subatomic particle with a positive charge
- 5. a chemical bond of two elements
- 7. a mathematical expression to find the wave function
- 8. electrons at the out edge of the shell
- 10. Subatomic particle with a neutral charge
- 11. who discovered the electron
- 12. type of model that includes element symbol as the nucleus
- 16. atom or molecule that gained or lost an electron