Chapter 9 Courtney Robertson

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Across
  1. 1. electrons-an electron in the outermost energy level of an atom.
  2. 5. Weight - average mass of the naturally
  3. 6. number- number of protons
  4. 8. have no electrical charge
  5. 9. carries an electrical charge is called an
Down
  1. 2. level- any of the possible energies
  2. 3. tiny,very light particles
  3. 4. much larger and heavier than elections
  4. 6. mass number- equal to the number of protons plus
  5. 7. less electron than proton =(+) positive charge;