Across
- 2. substances present after chemical reaction
- 4. basic unit of matter
- 5. change that results in new substance
- 9. characteristics
- 10. tells number of atoms of an element
- 14. only factor that can be changed in chem equation
- 15. pure substance with only one type of atom
- 16. amount of space object occupies
- 17. when a chemical change occurs, properties __
- 19. pure substance with more than one type of atom
Down
- 1. change that does not result in new substance
- 3. substances present before chemical reaction
- 6. releases heat; temp increases
- 7. amount of matter in an object
- 8. evidence of gas production
- 11. takes up space and has mass
- 12. Law of __ of mass; total amount of matter is constant
- 13. absorbs heat; temp decreases
- 15. a chemical ___ represents a chemical reaction
- 18. represents yields/produces