1.1 Atomic Structure & the Periodic Table

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Across
  1. 4. these are elements in Group 2 on the periodic table
  2. 8. electrons found in the outermost energy level of an atom
  3. 9. vertical columns on the periodic table
  4. 10. these elements are located in Groups 3-12 on the periodic table
  5. 13. the total number of protons + neutrons in the nucleus
  6. 14. horizontal rows on the periodic table
Down
  1. 1. arranged in increasing atomic number, so that elements with similar properties fall in the same column
  2. 2. subatomic particle with a negative charge
  3. 3. indicates the number of protons in the nucleus of an atom
  4. 5. these are the most reactive metals on the periodic table; located in Group 1
  5. 6. subatomic particle with a positive charge
  6. 7. subatomic particle with no charge; located in the nucleus with protons
  7. 11. these elements are not reactive because they have a full outer energy level; located in Group 18
  8. 12. these are the most reactive nonmetals on the periodic table; located in Group 17