Across
- 4. a joining of different parts
- 7. mass the mass of a given molecule
- 8. process of rotting or decaying
- 10. number on the bottom right of a symbol
Down
- 1. a numerical or constant quantity
- 2. left of the arrow in a chemical reaction
- 3. result of a chemical reaction
- 5. a group of atoms bonded together
- 6. process of burning something
- 9. very important unit of measurement