Across
- 2. correctly modeled the electrons in hydrogen, but was unable to do so in other elements
- 5. negative charged particles
- 9. positive charged particles that weigh about 1 amu
- 11. Units we use to measure the weight of an atom / the units for the weight of a proton and neutron
- 13. Z-E =
- 14. neutral charged particles that weigh about 1 amu
- 15. model of the atom named after a popular pudding
- 18. space outside of the nucleus where electrons are found
Down
- 1. Confirmed the charge of an electron through the oil drop experiment
- 3. Found that most of the atom is empty space through the gold foil experiment
- 4. used a wave equation that calculated energy calculated energy levels of electrons but not their exact location
- 6. Did the Cathode ray experiment
- 7. discovered the neutron
- 8. sum of protons and and neutrons
- 10. Center of atom contain protons and neutrons
- 12. An atom with a different number of neutrons is called a(n)
- 16. all matter is composed of
- 17. Created the Billiard Ball Model of the atom