Scientist

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Across
  1. 2. discovered periodicity: using a arrangement of elements the properties of elements would repeat after some period
  2. 6. founded the behavior of particles and the waves on the atomic scale can be expressed in units using a constant called planck’s constant.
  3. 8. discovered the electron using a cathode ray tube experiment
  4. 9. arranged elements by atomic number
  5. 10. realized that triads have similar properties
Down
  1. 1. discovered the neutron by bombarded Be with a alpha particle
  2. 3. founded the atomic theory: all matter is made up of tiny particles called atoms
  3. 4. founded and named 4 elements in fire, earth, water, and air
  4. 5. discovered the electron using a cathode ray tube experiment
  5. 7. looked for a way to organize elements so he devised the periodic table with increasing atomic weight
  6. 9. plotted atomic volume vs weight and discovered the first periodic table trend
  7. 11. found that electrons move in layers and not in a random movement (gold foil exp.)