Across
- 3. Element named after Marie Curie
- 5. Radioactive noble gas linked to lung cancer risk
- 7. Element named after a dwarf planet
- 8. Gas used in excimer lasers and lighting, heavier than air
- 9. Lanthanide known for strong magnets
- 10. Element with atomic number 74
- 11. Alkali metal that explodes violently in water and is stored in oil
- 12. Element whose symbol derives from stannum
- 13. Element whose name comes from the Greek for “water-forming”
Down
- 1. Halogen that is liquid at room temperature
- 2. Most electronegative element
- 4. Transition metal with the highest melting point
- 6. First element synthesized (not naturally occurring on Earth)
- 11. Metalloid essential in semiconductors