chem, chap 1&2

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emilyyx14
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105324
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chem, chap 1&2
Updated:
2011-09-29 22:13:08
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chem
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chem
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  1. what are the 5 divisions of chemistry
    • organic
    • inorganic
    • bio chemistry
    • analytical
    • physical
  2. organic chemistry
    • study of substances
    • new fibers
  3. inorganic chemistry
    • study of substances that do not contain carbon
    • paints
  4. bio chemistry
    • study of substances & process of living things
    • neuro chemistry
  5. analytical chemistry
    • break down materials
    • CSI
  6. physical chemistry
    • how reactants occur (atomic level)
    • LASERS
  7. what is alchemy
    • more like a religion
    • belief system (lacked logic)
    • developed independency
    • came from 4 elements concept
    • believed lower metals could be turned into gold
  8. alchemy impact on chemistry
    developed tools & processes we still use today
  9. factors that shifted alchemy to chemistry
    ANTOINE LAURENT-LAVOISIER
  10. how did ANTOINE LAURENT-LAVOISIER work influence the change
    his experiments proved oxygen was needed to burn stuff not PHLOGISTON
  11. what are the 4 basic steps of the scientific method?
    • observation
    • hypothesis
    • experiment (data)
    • develop a theory (analyze, conclusion)
  12. what are the 2 types of variables?
    • manipulated (independent) CHANGES
    • responding (dependent) DOES NOT CHANGE
  13. theory
    • well tested explanation
    • CAN CHANGE
    • CAN'T BE PROVEN
    • WHY
  14. law
    • summarizes results of many observations
    • DESCRIBES
    • DOES NOT EXPLAIN
    • WHAT
  15. intensive
    • depends on type of matter
    • color, conductivity, hardness, density
  16. extensive
    • amount of sample
    • mass & volume
  17. does not tarnish is what property and why
    chemical property because of the lack of reactivity
  18. homogeneous
    same, uniform throughout
  19. heterogeneous
    different amounts of each
  20. heterogeneous is often a
    solution
  21. homogeneous mixtures can NEVER be a
    solution
  22. heterogeneous & homogeneous mixtures are both
    substances
  23. phase
    the moment of time when something is changing
  24. distillation
    method of separating mixtures based on differences in boiling points
  25. substance
    existence
  26. who is Berzelius
    made chemical symbols
  27. transmuting
    to make things into gold
  28. physical change
    the material is itself before and after the change
  29. chemical change
    the substances present in the beginning are no longer present at the end or new substances are formed. the change is irreversible
  30. examples of physical properties
    color, smell, freezing point, density
  31. examples of chemical properties
    heat of combustion
  32. the particles in gas are
    spread apart
  33. particles in gas are
    close but with no arrangement
  34. particles in solids are
    tightly packed in a uniform way
  35. mixtures
    when two or more substances have been combined

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