Chapter 2 Vocab

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Across
  1. 3. Mass that is read right off the Periodic Table.
  2. 4. Gave us atomic number.
  3. 5. Atoms or groups of atoms with a negative charge
  4. 6. Electrons move around a nucleus, but only in prescribed orbits
  5. 8. Discovered the electron. Gave us plum pudding experiment. He also contributed cathode rays.
  6. 10. Measured charge of electron using the oil drop experiment
  7. 12. Discovered the nucleus using the Gold Foil experiment
  8. 13. Gave us idea of atom.
  9. 14. Said atom is hard indestructible. Gave us first useful atomic theory of matter
  10. 15. An atom or group of atoms with a positive charge.
Down
  1. 1. Atoms with the same number of protons, but different number of neutrons.
  2. 2. Number of protons and neutrons combined.
  3. 5. The number of protons in an element.
  4. 7. Discovered the neutron
  5. 9. Discovered the proton.
  6. 11. An atom or group of atoms that has a positive or negative charge.