Across
- 3. Discovered electrons
- 7. The smallest particle of an element that can enter into a chemical combination
- 8. An acronym for light amplification by stimulated emission of radiation; it produces coherent, monochromatic light
- 10. A discrete amount of energy
- 11. Discovered neutrons
- 12. The energy levels above the ground state in an atom
- 14. A “particle” of electromagnetic energy
- 15. the widely accepted model of the atom today
Down
- 1. It is impossible to know a particle’s exact position and velocity simultaneously
- 2. Rutherford's student who developed the theory that electrons orbit around the nucleus in set orbits and paths, which are known as energy levels
- 4. The emission of electrons that occurs when certain metals are exposed to light
- 5. The branch of physics that replaced the classical-mechanical view (that everything moved according to exact laws of nature) with the concept of probability
- 6. A set of bright spectral lines of certain frequencies or wavelengths formed by dispersed light from a gas of a heated element. Each element gives a different set of lines
- 9. The numbers (n = 1, 2, 3 . . . ) used to designate the various principal energy levels that an electron may occupy in a hydrogen atom
- 13. His model is known as the "Plum Pudding Model"
- 16. Completed the Gold Foil Experiment