Across
- 4. are substance that help reaction proceed faster
- 5. change the results when two or more substance react to create a different substance or substances
- 6. a table in which the elements are organized by their physical and chemical property
- 8. property that describes the physical appearance and composition of a substance
- 11. pure substance formed when at least one metal and non metal combine
- 13. new substance produced
- 14. change in the appearance or state of a substance that does not change the composition
- 19. oxygen reacts with a substance
- 20. absorbs energy
- 23. mass of one atom of an element
- 24. can be broken down into other substance
- 25. cloudy mixture in which tiny particles of one substance are held within another and particles cannot be separated
Down
- 1. release energy
- 2. substance that react with another substance
- 3. description of how substance interacts with other substances
- 7. can be seperated
- 9. all products of a chemical reaction are accounted for
- 10. become electrically charged
- 12. most reactive of the metals
- 15. group 17 elements in periodic table
- 16. two or more pure substance
- 17. chemical combination of two or more elements in a specific ratio
- 18. number of protons in the nucleus
- 21. combination of pure substances
- 22. slow chemical change