Across
- 3. the breakdown of a metallic substance due to a chemical reaction with substances in the environment
- 5. how shiny a material is
- 6. occurs when a substance changes to produce a new substance
- 7. a compound produced when iron reacts with oxygen and water in the atmosphere
- 9. a collection of symbols and numbers that represents the number of atoms in a particle of an element or compound
- 10. a plastic made from starch derived from plants
- 11. a particle in which two or more atoms of different non-metal elements are chemically bonded together
- 14. a new substance produced in a chemical reaction
- 15. the ability of a substance to be drawn into wires
- 16. a pure substance made up of two or more different atoms chemically bonded together
- 17. the ability of a substance to catch fire
- 20. a green patina caused by the reaction of copper with air or sea water over a long period of time
- 23. the ability of a substance to transfer heat
- 24. the properties that show how a substance reacts when combined with other substances
- 25. the ability of a substance to bend or be hammered into different shapes
- 26. occurs when the form of a substance changes, but the kind of substance remains the same
- 27. a column down the periodic table
- 28. the properties of substance that can be observed or examined without changing the composition of a substance
- 31. when the chemical make-up of a substance changes, and a new substance or substances are formed
- 32. capable of decomposing by the action of micro-organisms
- 33. a substance made up of different types of particle, physically combined
Down
- 1. a large molecule made up of small repeating subunits chemically bonded together
- 2. a substance used up in a chemical reaction
- 4. the ability of a substance to transfer electricity
- 8. how poisonous a substance is
- 12. a letter (or letters) of the alphabet used to represent an atom of a specific chemical element
- 13. a particle in which two or more atoms of the same non-metal element are chemically bonded together
- 18. s molecule consisting of two atoms
- 19. a row across the periodic table
- 21. a substance made up of the same type of particle
- 22. does not break down
- 26. a characteristic or feature of a substance
- 29. both a philosophy and ancient practice of science; alchemists attempted to turn base elements into precious metals and to create a substance that would provide immortality
- 30. a pure substance made up of only one type of atom; cannot be broken down into a simpler substance