units 5 and 6

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Across
  1. 6. A green patina caused by the reaction of copper with air or sea water over a long period of time
  2. 7. A letter/s of the alphabet used to represent an atom of a specific chemical element
  3. 9. A plastic made from starch derived from plants such as corn and potato
  4. 12. Does not break down
  5. 14. A substance used up in a chemical reaction
  6. 16. The ability of a substance to transfer electricity
  7. 21. Both a philosophy and ancient practice of science
  8. 27. A particle in which two or more atoms of the same non-metal element are chemically bonded together
  9. 29. The properties that show how a substance reacts when combined with other substances
  10. 31. A pure substance made up of only one type of atom
  11. 33. A characteristic or a feature of a substance
  12. 34. How shiny a material is
Down
  1. 1. A substance made up of different types of particles
  2. 2. How poisonous a substance is
  3. 3. The properties of a substance that can be observed or examined without changing the composition of a substance
  4. 4. A substance made up of the same particles
  5. 5. A column down the periodic table
  6. 8. A compound produced when iron reacts with oxygen and water in the atmosphere
  7. 10. Occurs when a substance changes to produce a new substance
  8. 11. The breakdown of a metallic substance due to a chemical reaction with substances in the environment, such as oxygen and water
  9. 13. Capable of decomposing by the action of micro-organisms
  10. 15. A particle in which two or more atoms of different non-metal elements are chemically bonded together
  11. 17. A pure substance made up of two or more different atoms chemically bonded together
  12. 18. A collection of symbols and numbers that represent the the number of atoms in a particle of an element or compound
  13. 19. A molecule consisting of two atoms
  14. 20. When the chemical make-up of a substance changes, and a new substance or substances are formed
  15. 22. The ability of a substance to transfer heat
  16. 23. The ability of a substance to catch fire
  17. 24. Occurs when the form of a substance changes, but the kind of substance remains the same
  18. 25. The ability of a substance to blend or be hammered into a different shape
  19. 26. The ability of a substance to be drawn into wires
  20. 28. A row across the periodic table
  21. 30. A larger molecule made up of small repeating subunits chemically bonded together
  22. 32. A new substance produced in a chemical reaction