Chemistry Crossword Puzzle

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Across
  1. 2. A chemical element of atomic number 53, a nonmetallic element forming black crystals and a violet vapor.
  2. 4. The ratio between the mass and the amount of substance
  3. 6. A laboratory.
  4. 8. The chemical element of atomic number 4, a hard gray metal.
  5. 9. A colorless, odorless, highly flammable gas, the chemical element of atomic number 1.
  6. 12. The chemical element of atomic number 7, a colorless, odorless unreactive gas that forms about 78 percent of the earth's atmosphere.
  7. 15. A colorless, odorless gas produced by burning carbon and organic compounds and by respiration.
  8. 16. Significant figures are the number of digits in a value or a measurement necessary to decide the accuracy and precision of measurement.
  9. 19. The people that work with you in the lab.
  10. 20. To protect your hands
Down
  1. 1. A chemical element of atomic number 19, a soft silvery-white reactive metal of the alkali metal group.
  2. 3. The chemical element of atomic number 5, a nonmetallic solid.
  3. 5. A liquid
  4. 7. Rules made to keep you safe
  5. 10. A stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
  6. 11. The chemical element of atomic number 3, a soft silver-white metal.
  7. 13. A lipped cylindrical glass container for laboratory use.
  8. 14. Goggles to protect your eyes.
  9. 17. The chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.
  10. 18. The chemical element of atomic number 5, a nonmetallic solid.