Chapter 9-Emma Majewski 1 block

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Across
  1. 1. =number of protons+neutrons
  2. 6. an electron in the outside shell of an atom
  3. 7. =periods
  4. 9. orbit around the nucleus, negative charge
  5. 11. positive charge, located in the nucleus
Down
  1. 1. =number of protons
  2. 2. designer of the periodic table
  3. 3. no electric charge, located in the nucleus
  4. 4. most important table in science
  5. 5. normal,# of protons and neutrons does not change
  6. 8. 2 atoms with a different # of neutrons but the same protons
  7. 10. =groups