Across
- 4. Can form up to 10 million different compounds
- 7. One of the most abundant elements, however, it is rare to find on Earth
- 9. Colorless metal named after the Greek word for color
- 10. The most common element
- 11. Commonly associated with radioactivity and nuclear weapons
- 15. One of the three elements formed in the Big Bang
- 16. The most electronegative atom
- 17. Most of the Earth's rock and mantle is made of it
Down
- 1. One of the most popular poisons throughout the ages
- 2. Commonly found in salt crytals
- 3. One of the most inert metals in bulk
- 5. Has a very distinct smell
- 6. The first man-made element
- 8. Its florescence is ideal for lamps
- 12. Rare in its pure form but abundant in the Earth's crust
- 13. One of the best chemical catalysts
- 14. The first chemical weapon used in World War 1