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