Across
- 2. creator of the law of conservation of mass
- 3. the idea that matter cannot be created or destroyed, only transformed
- 4. purest substance made of one type of atom
- 5. substances present before a chemical reaction
- 8. anything that has mass or takes up space
- 9. neutrally charged part of an atom
- 10. positively charged part of an atom
Down
- 1. an equation where both sides have the same number of atoms
- 6. negatively charged part of an atom
- 7. substances created as a result of a chemical reaction