Periodic Table of Elements Crossword Puzzle

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Across
  1. 3. Metals are found on the ____ of the table.
  2. 7. The bottom row of rare Earth metals.
  3. 9. The periodic table is arranged by _____ (vertically)
  4. 11. Table was made by __________.
  5. 13. This is number of protons and electrons.
  6. 14. There are 6 of these known to exist; smaller particles that make up protons and neutrons
  7. 15. Nonmetals are very ____ solids; the opposites of metals.
  8. 16. The periodic table was published in 18__.
  9. 17. Transition metalsare found in ______.
  10. 19. Most common element in the universe.
  11. 20. Nonmetals form compounds called ____.
  12. 21. Gas used to make bright city lights.
Down
  1. 1. The periodic table is arranged by _____ (horizontally)
  2. 2. Nonmetals are found on the ____ of the table.
  3. 4. Average of all of the elements isotopes.
  4. 5. The top row of rare Earth metals.
  5. 6. Metalloids are most often used in ____.
  6. 8. ________ arranged the elements by atomic number
  7. 10. This is the abbreviation for the element.
  8. 12. Metals are elements that conduct ___ very well.
  9. 18. There are ___ number of groups in the periodic table.