Across
- 2. A liquid metal
- 7. Used to blow up balloons
- 8. Added to salt
- 9. Common element in the rotten egg nebula
- 11. The Periodic Table is a resource in this topic
- 12. Most of the atmosphere
- 13. Found in milk, bones, and chalk
- 15. A metalloid used in computer chips
Down
- 1. Superman's weakness
- 3. Most abundant metal in Earth's crust
- 4. Atoms are made of these
- 5. Created the Periodic Table
- 6. Used to make super strong magnets
- 10. The lightest element
- 11. A person who does chemistry
- 14. Element with atomic number 79