Across
- 3. organic catalyst
- 7. negatively charged particle
- 9. horizontal column of the periodic table of elects
- 10. group 18 on the periodic table of elements
- 13. an experiment which all reactants and all products of a chemical reaction are accounted for
- 14. vertical column of elements on the periodic table
- 15. a reaction that takes place when two or more substances react to form new substances
- 16. description of how a substance interacts with other substances such as acids
- 18. chemical reaction that releases energy
- 20. an element with both metal and non-metal properties
- 21. positively charged particle in the nucleus of an atom
Down
- 1. a solution in which water is the solvent
- 2. chemical combination of two more elements in a specific ratio
- 4. substance made of only one type of matter
- 5. pure substance formed when non-metals mix
- 6. neutral particle the nucleus of an atom
- 8. substance that helps speed up chemical reaction
- 11. chemical reaction that absorbs energy
- 12. change that results when two or more substances react to create a different substance or substances
- 17. a formula of symbols that represent a compound
- 19. an experiment in which one or more products of a chemical reaction can escape