CHEM 1211 CH.4

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pineopple
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104988
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CHEM 1211 CH.4
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2011-09-28 17:50:02
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CHEM 1211
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CHEM 1211 CH.4 VOCAB
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  1. Element:
    pure substances that cant be seperated into simpler substances by ordinary laboratory processes

    Building blocks of matter
  2. Symbol:
    represents the name of an element
  3. Periodic Groups:
    contain elements with similar properties in vertical columns
  4. Periodic Periods:
    horizontal row of elements
  5. Alkali Metals:
    Group 1A
  6. Halogens:
    Group 7A
  7. Dalton's Atomic Theory:
    Atoms are tiny particles of matter

    Atoms are of two or more different elements combine to form compunds
  8. Thomsen's "Plum Pudding"
    Model of the Atom
    Discovered that cathode rays were streams of small negatively charged particles called electrons
  9. Rutherford's Gold Foil Experiment
    There must be small, dense positively charged nucleus in the atom that deflects positive particles that come close
  10. Proton's mass:
    1.007
  11. Neutron mass:
    1.008
  12. Electron:
    0.00055amu
  13. Atomic Number
    Identifies the Element

    Specific for each element

    Equal to the number of protons in an atom
  14. Mass Number
    Equal to number of protons + number of neutrons
  15. Isotopes
    are atoms of the same element that have different mass numbers

    have the same number of protons but different number of neutrons
  16. Nuclear Symbol
    gives the mass number in the upper left corner and the atomic number in the lower left corner
  17. Atomic Mass
    listed below the symbol of the element

    gives the mass of an "average" atom

    Not the same as mass number
  18. Al
    Aluminum
  19. Ar
    Argon
  20. As
    Arsenic
  21. Ba
    Barium
  22. B
    Boron
  23. Br
    Bromine
  24. Cd
    Cadmium
  25. Ca
    Calcium
  26. C
    Carbon
  27. Cl
    Chlorine
  28. Cr
    Chromium
  29. Co
    Cobalt
  30. Cu
    Copper
  31. F
    Fluorine
  32. Au
    Gold
  33. He
    Helium
  34. H
    Hydrogen
  35. I
    Iodine
  36. Fe
    Iron
  37. Pb
    Lead
  38. Li
    Lithium
  39. Mg
    Magnesium
  40. Mn
    Manganese
  41. Hg
    Mercury
  42. Ne
    Neon
  43. Ni
    Nickel
  44. N
    Nitrogen
  45. O
    Oxygen
  46. P
    Phosphorus
  47. Pt
    Platinum
  48. K
    Potassium
  49. Ra
    Radium
  50. Si
    Silicon
  51. Ag
    Silver
  52. Na
    Sodium
  53. Sr
    Strontium
  54. S
    Sulfur
  55. Sn
    Tin
  56. Ti
    titanium
  57. U
    Uranium
  58. Zn
    Zinc

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