Across
- 3. #8 on the periodic table
- 6. a part of a molecule
- 8. The big numbers and letters in an equation
- 9. #6 on the periodic table
- 10. The small numbers in an equation
Down
- 1. #1 on the periodic table
- 2. hydrogen and carbon
- 4. cannot be simplified more
- 5. two or more atoms
- 7. a scientific equation