Bio Ch. 2 Chemistry Of Living Things

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Across
  1. 1. the building block of matter; the smallest part of an element possible
  2. 4. a substance that is present before a chemical reaction ad takes part in it, usually shown on the left-hand side of a chemical equation
  3. 6. a substance that can produce hydrogen ions in solution
  4. 8. a covalently bonded compound containing the element carbon
  5. 9. a substance that can produce hydroxide ions or accept hydrogen ions in solution
  6. 12. a class of nonpolar organic compounds that are insoluble in water and are used for energy storage and cell membranes in living things
  7. 14. the tendency of of energy to disperse and become less available to do work
  8. 16. a change in a substance that does not change the identity of the substance
  9. 19. the process by which one substance, the solute, is broken up into smaller pieces by and distributed within a second substance, the solvent
  10. 20. a measure of the average speed of the particles within a substance
  11. 24. an organic compound comprised of the elements carbon, hydrogen, and oxygen; includes sugars, starch, and cellulose
  12. 25. a class of simple organic compounds, important in living things as a source of both energy and structure
  13. 26. the smallest particle of a covalently bonded compound
  14. 27. a substance that changes the rate of a chemical reaction but is not itself used up or affected by the reaction
Down
  1. 2. the physical stuff that makes up the universe. Anything that occupies space and has mass
  2. 3. the substances formed during a chemical reaction, usually indicated on the right-hand side of a chemical equation
  3. 5. a class of organic compounds that serve as the building blocks of proteins
  4. 6. the attraction of particles in one substance for particles in a different substance
  5. 7. the process by which particles in solution are evenly distributed throughout the solvent by Brownian motion
  6. 10. a class of organic compounds that serve as the building blocks for the information storage molecules DNA and RNA
  7. 11. a pure substance made from two or more elements that are chemically combined
  8. 13. an attraction between two atoms as a result of sharing or transferring valence electrons
  9. 14. a pure substance made of only one kind of atom
  10. 15. the attraction between like particles within polar substances
  11. 17. a substance that binds to an enzyme and reduces its activity, thus slowing a chemical reaction that the enzyme catalyzes
  12. 18. the ability to do work, especially in Biology, the driver of the physical and chemical process necessary for life
  13. 21. a naturally occurring catalyst, usually a protein
  14. 22. 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
  15. 23. quality of molecules having an uneven distribution of electrical charge, resulting in some regions of a molecule having negative charge while others are positive