Across
- 2. a _________ change is when no new substance has formed
- 5. ___________________ of mass is a law that says matter cannot be created nor destroyed
- 7. a _________ change is when a new substance is formed
- 9. an unstable isotope that undergoes radioactive decay
Down
- 1. the final substances that are created from a chemical reaction
- 3. have the same number of protons but a different number of neutrons
- 4. a charged particle
- 6. the initial substances that react to cause a chemical reaction
- 8. the smallest particle of a chemical element