Science Crossword

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Across
  1. 3. Xe on the periodic table
  2. 6. Cu on the periodic table
  3. 7. K on the periodic table
  4. 13. Two or more atoms chemically joined together
  5. 14. The horizontal lines on the periodic table (rows)
  6. 16. B on the periodic table
Down
  1. 1. M on the periodic table
  2. 2. Sn on the periodic table
  3. 4. a pure substance that is on the periodic table
  4. 5. The vertical lines on the periodic table (columns)
  5. 8. The smallest particle of an element that can exist on its own
  6. 9. Made from two or more compounds or elements that can be separated
  7. 10. Highest percentage of gases in air
  8. 11. Two or more elements chemically joined together
  9. 12. H on the periodic table
  10. 15. Fe on the periodic table