Chapter 2

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Across
  1. 1. a substance that is present before a chemical reaction and stake part in it
  2. 3. the building blocks of matter
  3. 4. an attraction between two atoms as a result of sharing or transferring valence electrons
  4. 6. a change in a substance that results in one or more new substances being formed that have different physical and chemical properties than those of the original substance
  5. 7. the process by which particles in solution are evenly distributed throughout the solvent by brownian motion
  6. 9. the process by which one substance the solute, is broken up into smaller pieces by and distributed within a second substance the solvent
  7. 10. a substance that can produce hydroxide ions or accept hydrogen ions in solution
  8. 13. a class of nonpolar organic compounds that are insoluble in water and are used for energy storage and cell membranes in living things
  9. 14. the substances formed during a chemical reaction
  10. 15. the tendency of energy to disperse and become less available to do work
  11. 16. a change in a substance that does not change the idenity of the substance
  12. 21. a measurement o the average speed of the particles within a substance
  13. 23. an organic compound comprised of the elements carbon, hydrogen, and oxygen
  14. 24. a naturally occurring catalyst, usually a protein
  15. 26. the smallest paritcle of a covalently bonded compound
  16. 27. a class of organic compounds that serve as the building blocks of proteins
Down
  1. 2. a pure substance made from two or more elements that are chemically combined
  2. 3. the attraction of particles in one substance for particles in a different substance
  3. 5. a substance that binds to an enzyme and reduces its activity
  4. 8. the attraction between like particles within polar substances
  5. 11. a substance that can produce hydrogen ions in solution
  6. 12. a substance that changes the rate of chemical reaction but is not itself used up or affected by the reaction
  7. 15. a pure substance made of only one kind of atom
  8. 17. a class of simple organic compounds important in living things as a source of both energy and structure
  9. 18. the ability to do work
  10. 19. quality of molecules having an uneven distribution of electrical charge resulting in some regions of a molecule having negative charge while others are positive
  11. 20. a covalently bonded compound containing the element carbon
  12. 22. the physcial stuff that makes up the universe
  13. 25. a class organic compounds that serve as the building blocks for the information storage molecules DNA and RNA