Atoms and Elements

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Author:
kieu
ID:
62108
Filename:
Atoms and Elements
Updated:
2011-01-26 00:35:15
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CHM
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Description:
Chapter 4: Symbols
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  1. Hydrogen
    H
  2. Helium
    He
  3. Lithium
    Li
  4. Beryllium
    Be
  5. Boron
    B
  6. Carbon
    C
  7. Nitrogen
    N
  8. Oxygen
    O
  9. Fluorine
    F
  10. Neon
    Ne
  11. Sodium
    Na
  12. Magnesium
    Mg
  13. Aluminum
    Al
  14. Silicon
    Si
  15. Phosphorus
    P
  16. Sulfur
    S
  17. Chlorine
    Cl
  18. Argon
    Ar
  19. Potassium
    K
  20. Calcium
    Ca
  21. Titanium
    Ti
  22. Chromium
    Cr
  23. Manganese
    Mn
  24. Iron
    Fe
  25. Nickel
    Ni
  26. Copper
    Cu
  27. Zinc
    Zn
  28. Bromine
    Br
  29. Krypton
    Kr
  30. Rubidium
    Rb
  31. Strontium
    Sr
  32. Palladium
    Pd
  33. Silver
    Ag
  34. Cadmium
    Cd
  35. Tin
    Sn
  36. Antimony
    Sb
  37. Iodine
    I
  38. Xenon
    Xe
  39. Cesium
    Cs
  40. Barium
    Ba
  41. Tungsten
    W
  42. Platinum
    Pt
  43. Gold
    Au
  44. Mercury
    Hg
  45. Lead
    Pb
  46. Bismuth
    Bi
  47. Radon
    Rn
  48. Radium
    Ra
  49. Uranium
    U
  50. Theory: Atomos (Atom)= uncuttable, indivisible
    Democritus of Abdera
  51. Theory:
    1. First to associate the ancient idea of atoms with stoichiometry
    2. That a given compound always contains the same proportions (by mass) of the element
    3. *Law of Constant Composition*
    John Dalton
  52. Theory:
    1. Atom is breakable
    2. Cathode rars are negatively charged particles
    3. Particles are constituents of the atom
    4. Atom's structure has electrons suspended in a positively charged electric field
    J. J. Thomson
  53. Theory:
    1. Atom mostly empty space
    2. Atom contains a dense particle that was small in volume, compated to the atom, but large in mass
    3. This dense particle was positively charged
    Rutherford
  54. Dalton's Atomic Theory
    • 1. Elements are made of tiny particles called atoms.
    • 2. Atoms of one element can combine with atoms of other elements to form compounds
    • 3. Atoms are indivisible in chemical processes.

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