Unit B Crossword

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