Atomic Theory

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Across
  1. 2. The modern model describing electron probability and energy levels.
  2. 3. What electrons absorb or release when moving between levels.
  3. 6. A region around the nucleus where electrons are most likely to be found.
  4. 8. Scientist who discovered the nucleus through the gold foil experiment.
  5. 11. The smallest unit of matter that retains the properties of an element.
  6. 12. Scientist who proposed that electrons travel in specific energy levels.
Down
  1. 1. A neutral (uncharged) particle located inside the nucleus.
  2. 4. The dense center of the atom containing protons and neutrons.
  3. 5. Scientist who introduced the uncertainty principle in quantum theory.
  4. 7. A positively charged particle found in the nucleus of an atom.
  5. 9. Scientist who developed the “plum pudding” model of the atom.
  6. 10. A negatively charged particle that orbits the nucleus.