Across
- 2. Pb
- 4. highly reactive metal.
- 5. The hardest element to find
- 7. Atomic number:79
- 10. composes about 80% of the Earth's inner and outer cores.
- 11. is an essential nutrient for all green plants.
- 14. Something that represents something you cannot see directly
- 15. Sn
- 16. The most common element in the Universe
- 17. The first element discovered by humans
- 18. two-thirds the density of aluminum
- 20. All of its isotopes are radioactive
- 21. Hg
Down
- 1. when 2 or more elements are combined
- 3. Sb
- 6. is the most reflective metal
- 8. ALMOST A FIFTH OF YOUR BODY IS CARBON
- 9. Uue
- 12. has no odor, is tasteless, and colorless.
- 13. soft and white
- 17. the most abundant mineral in the body
- 19. the second most abundant element in the universe