Across
- 3. Called the "lazy one" due to its nonreactive nature
- 5. A lack of this element in a human's diet can cause irregular heart rhythms
- 8. Has an atomic mass of 14.0067
- 9. When breathed in, can make the voice sound high or squeaky
- 10. Makes up about 18% of the human body by mass
- 11. Used to be known as "Brimstone"
- 13. An essential part in nutrition for animals
- 16. Has an atomic mass of 3
- 17. The most abundant element on the earth's surface
- 18. The 7th most abundant element in the universe
- 19. Almost all of this element in the human body is stored in the bones
Down
- 1. Very versatile in its application, and is used as a rocket fuel igniter
- 2. Discovered in 1798 by French chemist Nicolas-Louis Vauquelin
- 4. Never found as a free element in nature because it is highly reactive
- 6. Name derives from Greek "Neos"
- 7. Has an atomic number of 19
- 9. Can be a gas, a liquid, or a solid
- 12. Most reactive of all chemical elements
- 14. Does not rust, unlike other metals
- 15. Used to clean pools