Biology: Chemistry of Life

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Across
  1. 3. measured by the pH scale
  2. 4. one particular type of atom
  3. 6. a polymer made of amino acids
  4. 8. A reaction that absorbs more energy than it releases
  5. 9. nonpolar molecules such as fats and oils
  6. 14. substance made up of atoms often bonded to other atoms
  7. 15. smallest basic unit of matter
  8. 17. substances changed during a chemical reaction
  9. 18. a compound that releases a hydrogen ion when it dissolves in water
  10. 20. a compound that removes hydrogen ions from a solution
  11. 21. A reaction that releases more energy than it absorbs
  12. 22. High specific heat means water resists changes in _________
  13. 23. neutral particle in an atom's nucleus
  14. 26. A __________ bond is an attraction between a slightly positive hydrogen ion and a slightly negative atom
  15. 28. a mixture of substances that is the same throughout
  16. 30. ______acids are chains of carbon atoms bonded to hydrogen atoms
  17. 31. an atom that has gained or lost one or more electrons
  18. 32. Polymers made up of nucleotides are __________ acids
  19. 34. a large molecule made of many monomers
  20. 36. group of molecules with a carbon base including sugars
Down
  1. 1. a catalyst for chemical reactions in living things
  2. 2. positively charged particle in an atom's nucleus
  3. 5. particles that determine the properties of the element
  4. 7. substances made by chemical reactions
  5. 10. a specific reactant for an specific enzyme
  6. 11. subunit of a complete molecule (like a link in a chain)
  7. 12. the attraction among molecules of different substances
  8. 13. a substance that dissolves in a solvent
  9. 14. A __________bond forms when atoms share a pair of electrons
  10. 16. negatively charged particle outside of the nucleus of an atom
  11. 19. a substance that increases the rate of a chemical reaction
  12. 24. the substance that is present in the greater amount is a solution and dissolves another substance
  13. 25. water is a ________molecule, meaning it has a positive region and a negative region
  14. 27. Sodium chloride is held together by _________ bonds
  15. 29. two or more atoms held together by covalent bonds
  16. 33. ______energy is the amount of energy that will break a bond between two atoms
  17. 35. the attraction among molecules of a substance