Unit 9

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Across
  1. 2. focusing one's mind or eyes on something
  2. 4. what something does, how it performs, how it reacts
  3. 5. describes particles that are smaller than a atom
  4. 7. negative electrical charge, not a positive electrical charge
  5. 11. finally
  6. 12. physicist who proposed modern atomic theory
  7. 15. proposed that all things are made up of smaller parts called atoms
  8. 17. something being done separately or one at a time
  9. 19. very tiny bits of matter with no electrical charge
  10. 20. something having to do with charged particles
Down
  1. 1. particles with a positive electrical charge
  2. 3. a person specializes in physics
  3. 6. a colorless, odorless, tasteless gas
  4. 8. something in the universe made up of one kind of atom
  5. 9. describes something related to an atom
  6. 10. particles with a negative electrical charge
  7. 13. tiny bits of matter
  8. 14. a combination of two or more elements
  9. 16. made up of all things that exist, including our solar system and beyond
  10. 18. the center of an atom, containing neutrons and protons