Chemistry Crossword

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Across
  1. 3. a material that electric charge can move through easily
  2. 4. description of a solid that can be stretched into a long wire
  3. 6. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
  4. 8. reaction that takes place when two or more substances react to form new substances
  5. 11. table in which the elements are organized by their physical and chemical properties
  6. 13. pure substance formed when non-metals combine
  7. 15. chemical reaction that releases energy
  8. 19. pure substance that cannot be broken down into other substances; substance made up of only one type of atom
  9. 21. group 17 elements in the periodic table; the most reactive non-metals
  10. 23. property that describes the physical appearance and composition of a substance
  11. 24. substance that reacts with another substance or substances in a chemical reaction to create new substances with different property
  12. 25. gases group 18 elements in the periodic table;the most stable and nonreactive elements
Down
  1. 1. slow chemical change that occurs when oxygen in the air reacts with a metal
  2. 2. chemical reaction that absorbs energy
  3. 5. combination of symbols that represent a compound; the formula identifies the elements in the compound and the amount of each element
  4. 7. ability of a substance to conduct electricity or heat
  5. 9. description of how a substance interacts with other substances, such as acids;chemical properties are observable only when chemical change occurs
  6. 10. energy stored in chemicals and released when chemicals react; a form of potential or stored energy
  7. 12. dull, brittle element that does not conduct electricity
  8. 14. substance that helps a chemical reaction to proceed more quickly
  9. 16. (CO(g))colorless, odorless gas;produced by incomplete combustion of chemicals containing carbon (e.g. hydrocarbons); major source: motor vehicles
  10. 17. Workplace Hazardous Materials Information System; a system of easy-to-see warning symbols on hazardous materials
  11. 18. change in the appearance or state of a substance that does not change the composition
  12. 20. catalyst involved in chemical reaction in living things
  13. 22. change that results when two or more substances react to create a different substance or substances; the new substances have completely different properties from the original ones