Across
- 2. hydrogen isotope with no neutrons (bean lab)
- 4. electrons on third level max
- 8. represented by "A"
- 10. discovered the nucleus
- 11. discovered the neutron
- 13. makes up 99.9% of atom's mass
- 14. electrons in outer shell
- 15. put electrons on energy levels
- 16. discovered the electron
- 17. atoms of same element w/ same atomic numbers but different mass numbers
- 21. name of a carbon atom w/6 protons & 8 neutrons
- 22. atomic theory
- 24. "N" in MAN
- 25. discovered the proton
- 26. modern periodic table
Down
- 1. hydrogen isotope with two neutrons (bean lab)
- 3. hydrogen isotope with one neutron (bean lab)
- 5. electrons on fourth level max
- 6. name of a fluorine atom w/9 protons & 11 neutrons
- 7. what atoms gain or lose to become ions
- 9. represented by "Z"
- 12. "atomos"
- 17. charged atom
- 18. first periodic table
- 19. protons and neutrons
- 20. electrons on first level max
- 23. "P" in APE
- 27. electrons on second level max