Across
- 1. For healthy bones
- 4. Combines with chlorine to form salt
- 5. Well known as poison
- 7. Lightest element in the periodic table
- 9. 1st of the noble gases
- 10. Used to light up signs, and is a noble gas
Down
- 2. Makes up diamonds and graphite pencils
- 3. Named after the Titans in Greek mythology
- 6. Often in swimming pools
- 8. Used to be used as money