Periodic Table Crossword Puzzle

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Across
  1. 5. horizontal rows on the periodic table
  2. 9. how many elements are found on the first row of the periodic table
  3. 12. something that can be hammered into thin sheets
  4. 14. the number of periods on the periodic table
  5. 16. the chemical symbol for sodium
  6. 17. elements that are typically solid, shiny, malleable, and good conductors of heat and electricity
  7. 19. a physical property of metals
  8. 20. a physical property of nonmetals
Down
  1. 1. Mendeleev, the inventor of the periodic table
  2. 2. a one or two-letter abbreviation of the element's name
  3. 3. 1st element of the periodic table
  4. 4. drawn into thin wires
  5. 6. number of vertical columns on the periodic table
  6. 7. symbol, the letter or letters on each element
  7. 8. found on the right side of the periodic table
  8. 10. hundred eighteen, the number of elements on the periodic table
  9. 11. vertical columns on the periodic table
  10. 13. number, appears above each element symbol
  11. 15. step line, location of the metalloids on the periodic table
  12. 18. which side of the periodic table are the metals