Chem Vocab Ch. 1-3

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ingersoll
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171221
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Chem Vocab Ch. 1-3
Updated:
2012-09-16 14:37:35
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Vocab
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Vocab, conversions and units of Chapters 1-3 (Chem 125)
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  1. Chemistry
    the science of matter and the changes which matter undergoes
  2. matter
    anything that has mass and occupies space
  3. element
    a single atom of an element
  4. molecules
    collections of atoms having particular shapes
  5. periodic table
    2D arrangement of the elements
  6. subatomic particles
    protons, neutrons, electrons
  7. isotope
    atoms of the same element with a different # of neutrons
  8. Law of conservation of matter
    atoms of one element cannot be converted into atoms of another element by chemical means
  9. homogenous
    matter having a definite (fixed) composition
  10. allotropes
    elements that exist in a different form
  11. compounds
    substances consisting of 2+ elements
  12. chemical formula
    a representation of a substance that indicates the relative numbers of different atoms present using atomic symbols and numeric subscripts
  13. chemical bonds
    forces that hold atoms to one another in elements or compounds
  14. solution
    any homogenous mixture
  15. heterogenous
    any mixture that does not have a uniform composition throughout
  16. solvent
    the major component in which others are dissolved
  17. solute
    substance dissolved in the solvent
  18. aqueous
    solution in which the solvent is water
  19. alloy
    homogenous mixture of metals
  20. chemical change
    "chemical reaction"  a change resulting in at least one of the substances changing into a different substance, chemical bonds must change
  21. physical change
    a substance undergoes change in some property, but is not converted into a different substance
  22. endothermic
    heat absorbed
  23. exothermic
    heat released
  24. sublimation
    solid -> gas
  25. chemical properties
    the ways in which chemical substances react with other chemical substances
  26. physical properties
    the physical characteristics of a chemical substance (misture or substances)
  27. scientific notation
    the method of expressing any # as a nuber between 1 and 10 multiplied by some power of 10
  28. foot 
    12 in
  29. yard
    3 ft
  30. mile
    5280 ft
  31. meter
    m
  32. kilogram
    kg
  33. second
    s
  34. kelvin
    K   C+273.15
  35. mole
    mol
  36. Newton
    N  
  37. Joule
    J     or N x m
  38. Pascal
    Pa   and 
  39. giga
    109
  40. mega
    106
  41. kilo
    103
  42. deci
    10-1
  43. centi
    10-2
  44. milli
    10-3
  45. micro
    10-6
  46. nano
    10-9
  47. pico
    10-12
  48. Ångstrom
    Å  10-10 m
  49. atmosphere
    atm    760 torr, 1.01325 bar
  50. torr
    torr   mmHg
  51. bar
    bar    0.987 atm or 750 torr
  52. Celsius
    C= 5/9 (F-32)
  53. cubic cm
    cmor cc    cm3= mL
  54. hertz
    hz    hz=s-1
  55. OTHER USEFUL CONVERSIONS
    1 in= 2.54 cm, 1 lb= .454 kg, 1 L= 1.06 qt, 1 mile= 1.609 km

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