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