Science Periodic Table Puzzle

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Across
  1. 4. less active metals often used in coins
  2. 7. combinations of metallic elements
  3. 8. nonmetals that are stab le and gases at room temperature
  4. 9. have characteristics of metals and nonmetals
  5. 10. a tool used by chemists to categorize the elements
Down
  1. 1. shiny, malleable,good conductors
  2. 2. The 18 vertical columns of the periodic table
  3. 3. the 8 horizontal rows of the periodic table
  4. 5. dull, poor conductors
  5. 6. highly reactive metals with 1 extra electron