Chapter 2

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Across
  1. 1. a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
  2. 3. acid
  3. 6. any of a class of sugars whose molecules contain two monosaccharide residues.
  4. 9. amino acid
  5. 10. also known as Bohr’s atomic model
  6. 11. A reaction where bonds are broken.
  7. 14. a bond involving the sharing of electrons netween atoms
  8. 15. the outermost shell of an atom containing the valence electrons.
  9. 16. Basic unit of a chemical element.
  10. 17. anything that has mass and takes up space
  11. 18. a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
  12. 20. a substance that accepts hydrogen ions
  13. 22. spheroproteins
  14. 26. A number equal to the sum of all the neutrons and the protons in an atom's nucleus.
  15. 30. an example of monosaccharides
  16. 32. a radioactive isotope.
  17. 33. include wax and oil
  18. 41. antibodies is an example of this
  19. 42. chemical reaction in which an acid and a base react quantitatively with each other.
  20. 44. molecules consist of many nucleotides linked in a long chain.
  21. 45. a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances. Creates a new substance.
  22. 46. ribonucleic acid
  23. 50. the energy of a body or a system with respect to the motion of the body or of the particles in the system.
  24. 52. power
  25. 53. structure of dna
  26. 56. particle with a neutral charge
  27. 58. another term would be inert energy
  28. 59. a carbohydrate whose molecules consist of a number of sugar molecules bonded together.
  29. 60. a polysaccharide
  30. 61. a lipid containing a phosphate group in its molecule
  31. 63. a solution that resists changes in pH when acid or alkali is added to it.
  32. 66. organic compound composed of carbon, hydrogen, and oxygen; includes starches, sugars, and glucose.
  33. 68. a group of atoms bonded together
  34. 69. Also known as Electron shells
  35. 70. Adenosine triphosphate
  36. 71. protein
  37. 72. each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei
Down
  1. 2. the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
  2. 4. a measure of the hydorgen ion concentration of a solution
  3. 5. also known as triglycerides
  4. 7. letters that represent an element
  5. 8. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
  6. 12. a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
  7. 13. the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
  8. 19. the ionized or ionizable constituents of a living cell, blood, or other organic matter.
  9. 21. fibrous proteins
  10. 23. Carbon-containing compound.
  11. 24. created in 1869
  12. 25. Positive subatomic particle.
  13. 27. a substance that liberates hydrogen ions when in an aqueous solution.
  14. 28. Energy form directly involved in putting the matter into motion.
  15. 29. Composed of 2 or more elements.
  16. 31. a region on an enzyme that binds to a protein or other substance during a reaction.
  17. 34. the base
  18. 35. Lack of carbon; compound.
  19. 36. a change from one state (solid or liquid or gas) to another without a change in chemical composition
  20. 37. process in which molecules are formed, changed, or broken down.
  21. 38. A bond that forms when electrons are transferred from one atom to another.
  22. 39. energy form stored in the bonds of chemicals
  23. 40. a lipid
  24. 43. electrical charge
  25. 47. atomic mass
  26. 48. one of a class of substances that cannot be separated into simpler substances by chemical means.
  27. 49. single sugar
  28. 51. also known as Rutherford atomic model
  29. 54. a lipid
  30. 55. A reaction where 2 or more molecules or atoms combine to form a larger and more complex molecule.
  31. 57. energy that travels by waves or particles
  32. 62. A reaction where bonds are broken and combined.
  33. 64. form the basic structural unit of nucleic acids
  34. 65. particle with a negative charge
  35. 67. deoxyribonucleic acid