Across
- 3. British playing cards
- 4. is 4-5 times heavier then air
- 5. in lungs
- 8. a popular Minecraft mod
- 12. propylene oxide
- 14. named after a planet
- 15. Tom daxon
- 16. IUPAC
Down
- 1. unknown-one of the most elusive and newly discovered elements
- 2. the surface of mars is red because of it
- 6. the longest lived isotope
- 7. it’s a solid that turns into a purple gas
- 9. Hermes’
- 10. what is the least durable Minecraft armour
- 11. thullotoxicosis
- 13. highly radioactive synthetic and unstable