Atomic History

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