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