Combining Atoms

12345678910
Across
  1. 2. Hydrogen + Carbon
  2. 3. Big number in compounds
  3. 6. ()
  4. 9. Two or more elements combined
  5. 10. x
Down
  1. 1. Two of the same element bonded
  2. 4. On Periodic Table
  3. 5. =
  4. 7. Smallest part of an element
  5. 8. Small number in compounds