Periodic Table Crossword

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Across
  1. 2. An element commonly used in thermometers.
  2. 5. Each vertical column of elements.
  3. 6. Each horizontal row of elements.
  4. 7. The Chemical Symbol for this is N.
  5. 8. A shiny, brittle substance that can be smashed into a powder.
  6. 10. More than half of the these are gases at room temperature.
  7. 12. Group 17.
  8. 13. This describes something that occurs or repeats at regular intervals.
  9. 15. Good conductors or electric currents.
  10. 16. this is what each element is identified by.
  11. 18. A substance almost as hard a diamond, but very brittle.
Down
  1. 1. The most reactive metals.
  2. 2. Also known as semiconductors.
  3. 3. This group has 4 electrons in its outer level.
  4. 4. The element in period 1.
  5. 9. The Russian Chemist that discovered a pattern to the elements.
  6. 11. The symbol for this is Na.
  7. 12. The symbol for Mercury.
  8. 14. The hardest material known.
  9. 16. Halogens have this many electrons in its outer level.
  10. 17. The type of gases in the last group.