RH

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Across
  1. 5. My Precious is made of this Metal
  2. 7. Element of a Digging Sibling
  3. 9. Ingredient in Fire, Not in Space
  4. 11. Unripe Gold
  5. 12. Small Pumping Organ
  6. 16. See-Through Glasses use this
  7. 18. Pencil Filling
  8. 19. A Very Bright Idea
  9. 21. Tongue Twister Animal Chucks This
  10. 23. Scale Defining Density of Liquid
  11. 24. The Better Siege Weapon
  12. 26. Russian Space Writing Tool
  13. 27. __________ prime, 1000000000000066600000000000001
  14. 28. Inventor of A^2xB^2=C^2
  15. 29. German Scientist, Invented E=MC2
  16. 30. Melted Horse
  17. 31. Very Spacious Dark Pit
Down
  1. 1. Main Element of the Human Body
  2. 2. Henry Cleans with this
  3. 3. Chinese Party Rockets
  4. 4. E.G. X+Y=Z
  5. 6. Unit of weight equal to 1000kg
  6. 8. Discoverer of the Formula of Gravity
  7. 10. A Number which eventually reaches 1 when replaced by the sum of the square of each digit
  8. 12. Flying Machine Using Very Big Knives
  9. 13. Fe+O, Iron Oxide,
  10. 14. Very Basic Metal, Tony Stark
  11. 15. Desk that holds the Elements of the world
  12. 17. Name for Pigs, Cows, Sheep, Etc.
  13. 20. A Number only Divisible by 1 and Itself
  14. 22. What Defines Who You Are
  15. 25. Alloy of Tin and Copper