Chemistry Research Crossword.

123456789101112131415
Across
  1. 4. It was first discovered in 1801.
  2. 5. Name mean "Lazy" in Greek.
  3. 8. Below -132 c
  4. 10. Highly radioactive and turns black in the air.
  5. 11. Rare gas found in the earth's air
  6. 13. Is the second most abundant metal on earth.
  7. 14. Named after an evil spirit.
  8. 15. Colorless, oderless, and lightest element.
Down
  1. 1. Name means the "Hidden" in Greek.
  2. 2. Doesn't react to oxygen.
  3. 3. Tasteless, radioactive gas.
  4. 4. Extremely rare on earth (0.0018%).
  5. 6. Structure is hexagonal close-packed (hcp)
  6. 7. Is extremely dense
  7. 9. The most stable isotope.
  8. 12. The name came from Germany.