Across
- 2. made the plum pudding model
- 3. what were all atoms known as before 1990
- 5. experiment run by JJ Thomspon
- 6. negative charge
- 8. father of the periodic table
- 10. smallest particle of matter
- 11. where is most of the mass in an atom located
- 12. number - atomic number= # of Neutrons
- 15. plum pudding experiment
- 18. no charge
Down
- 1. what charges was a proton have
- 4. atoms with the same number of protons but different amount of neutrons
- 7. Oxygen-17, with an atomic number of 10, has ? neutrons
- 9. said that atoms come in different shapes and sizes
- 13. the greek word for atom
- 14. the atomic number is also the number of…
- 16. came up with the atomic theory
- 17. How many protons are in hydrogen’s less common isotopes Hydrogen-2 and hydrogen-3?