Periodic Table Crossword

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Across
  1. 6. A row of elements
  2. 7. The hardest material known.
  3. 9. The element with the symbol Mg
  4. 12. elements that border the zigzag line on the periodic table
  5. 13. A dark gray solid with the symbol I
  6. 16. a yellowish green gas with the symbol CI
  7. 17. The element with the symbol N
  8. 18. Found to the left of the zigzag line on the periodic table
  9. 20. gases unreactive nonmetals in group 18 of the periodic table
Down
  1. 1. The element with the symbol Hf
  2. 2. or group A column of elements
  3. 3. A dark red liquid with the symbol Br
  4. 4. The element with the symbol Rb
  5. 5. law the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
  6. 8. shiny, reactive metals.
  7. 10. The element with the symbol Si
  8. 11. The most abundant metal in Earth's crust
  9. 14. can be drawn into thin wires
  10. 15. combines with most metals to form salts
  11. 19. The element with the symbol Na