Periodic Table

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Across
  1. 1. First group.
  2. 2. Part of period 6, under the periodic table.
  3. 4. How elements compare with other elements in there group.
  4. 5. Electrons in the outer energy level.
  5. 7. Dmitri Mendeleev placed elements in order by increasing ____________
  6. 8. Group 17.
  7. 9. Where electrons are found.
  8. 11. Last group.
  9. 13. Groups 3 through 12.
  10. 16. How two or more elements react together.
  11. 17. Row.
  12. 18. Column.
  13. 19. What the periodic table is made of.
Down
  1. 1. Second group.
  2. 3. Good conductor of heat and electicity.
  3. 6. Group 16.
  4. 10. Has properties of both metals and nonmetals.
  5. 12. Equals protons.
  6. 14. Gas or brittle solid and is not a good conductor of heat and electricity.
  7. 15. Under the lanthanides and all of them are radioactive.