Fundamental Forces

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Across
  1. 5. gravitational, elastic, and chemical are all types of ____
  2. 8. 1st fundamental force
  3. 9. 2nd fundamental force
  4. 12. a type of bomb and energy
  5. 13. 4th fundamental force
  6. 14. stable subatomic particle (+)
Down
  1. 1. a small portion of matter
  2. 2. collection of protons (+) and neutrons (neutral)
  3. 3. gravity is a fundamental ___
  4. 4. the 4 ____ forces
  5. 6. protons and electrons have positive and negative __
  6. 7. chemistry is based on chemical ____
  7. 10. 3d fundamental force
  8. 11. the weak force is responsible for radioactive ____