Chapter 9 Crossword Ellie Johnson

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Across
  1. 3. have a positive charge and are located in the nucleus
  2. 5. any of the possible energies an electron may have in an atom.
  3. 8. have no electrical charge and are located in the nucleus
  4. 9. equal to the number of protons plus neutrons.
  5. 10. more protons than electrons and has a positive charge
Down
  1. 1. more electrons than protons and has a negative charge
  2. 2. average mass of the naturally occurring isotopes of an element .
  3. 4. have a negative electrical charge and move around the outside of the nucleus
  4. 6. an electron in the outermost energy level of an atom.
  5. 7. number of protons in an element