Across
- 3. Physicist who proposed the quantum model of the atom where electrons are represented by areas where electrons are more likely to be found.
- 7. Type of radiation which consists of a burst of protons.
- 8. Physicist who discovered the electrons through the use of cathode ray tubes.
- 9. Subatomic particle with a negative polarity that moves at the speed of light around the atomic nucleus.
- 10. Spontaneously emitted waves of particles released by different elements as discovered by Marie and Pierre Curie.
- 12. Subatomic particle with neutral polarity that has a mass of 1 amu and is found in the nucleus of the atom.
- 15. Physicist who proposed the idea that atoms have a tiny nucleus that comprises the matter in an atom.
Down
- 1. Physicist who stated the "uncertainty principle" regarding the position of electrons moving at the speed of light.
- 2. Amount of energy required to be absorbed by an electron in order to jump to the next energy level in the atom.
- 4. Small area in the center of the atom that contains the 99.99% of all the matter that makes up the atom.
- 5. Type of radiation which consists of a burst of neutrons.
- 6. Physicist who find different energy levels within the atom were electrons move showing a wave-like behavior.
- 11. German physicist who invented the first device used to measure radiation.
- 13. Subatomic particle with a positive polarity that has a mass of 1 amu and is found in the nucleus of the atom.
- 14. Type of radiation which consists of a burst of electrons.