Across
- 8. a reaction that takes place when two or more substances to react to form new substances
- 9. vertical column of elements in the periodic table
- 10. change of state from a solid to a gas
- 11. group 1 elements in the periodic table; the most reactive of the metals
- 12. group 2 elements in the periodic table; reactivity is not as strong as the alkali metals
- 13. change of state from a gas to a solid
- 14. new substance produced in a chemical reaction between reactants
- 16. combination of symbols that represent a compound
- 20. refers to the three common states in which matter can exist
- 23. a system of easy-to-see warning symbols on hazardous materials
- 24. characteristic that describes a particular substance
Down
- 1. change that results when two or more substances react to create a different substance or substances
- 2. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
- 3. ability of a substance to conduct electricity or heat
- 4. positively charged centre of an atom
- 5. chemical combination of two or more elements in a specific ratio
- 6. description of how a substance interacts with other substances
- 7. change of state from a gas to a liquid
- 14. horizontal row of elements in the periodic table
- 15. an experiment in which all reactants and all products of a chemical reaction are accounted for
- 17. substance that helps a chemical reaction to proceed more quickly
- 18. change of state from a solid to a liquid
- 19. smallest part of an element that is representative of that element
- 21. change of state from a liquid to a gas
- 22. change of state from a liquid to a solid