Physical Science Halfway Crossword

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Across
  1. 4. Tries to explain a scientific phenomenon
  2. 7. Scientist who discovered the nucleus (gold foil)
  3. 11. Group on the periodic table with 7 valence electron
  4. 12. Anything with mass
  5. 13. Negatively Charged Subatomic Particle
  6. 14. The center of an atom; made up of protons and neutrons
  7. 17. Period 4, Group 9
  8. 18. An atom of an element with a different charge
  9. 19. The outermost electrons are called ______ electrons
Down
  1. 1. A Russian Chemist who really liked solitaire
  2. 2. The smallest element on the Periodic Table
  3. 3. Mr. Lagaras's second favorite holiday
  4. 5. Period 3 with 2 valence electrons
  5. 6. Neutrally Charged Subatomic Particle
  6. 8. The highest voted Thanksgiving Food in the last poll
  7. 9. Makes a statement about a scientific phenomenon
  8. 10. An atom of an element with a different mass number
  9. 15. Positively Charged Subatomic Particle
  10. 16. The Latin Prefix for five