Periodic Table

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Across
  1. 2. is a dark amorphous powder
  2. 5. First elements on the periodic table
  3. 8. odorless and invisible radioactive gas
  4. 10. 30 times rarer than gold
  5. 11. Also known as a planet
  6. 12. named after death-dealing goblins
  7. 13. symbol is O
  8. 14. Used in nuclear bombs
  9. 15. Makes great art
  10. 16. Originates from the Greek word osme
  11. 19. metalloid that starts with A
Down
  1. 1. Densest of all metals
  2. 3. Chemical element of Zn
  3. 4. dicovered in 1981 (transition metal)
  4. 6. Chemical element with the symbol of Be
  5. 7. Chemical symbol of Kr,and is a noble gas
  6. 9. 28 on the periodic table
  7. 10. rare and highly radioactive metal
  8. 17. Most reflected metal
  9. 18. has no known biological role