Chap 1-4 review

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Author:
michaelirby98
ID:
274816
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Chap 1-4 review
Updated:
2014-05-19 16:38:17
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Chem
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Chemistry final
Description:
Chemistry final, Chap 1-4
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  1. Steps to the scientific method
    • Make an observation- qualitative vs qualitative and gather data
    • Formulate a hypothesis 
    • Experiment that hypothesis
  2. Theory/Model
    set of hypotheses that agrees with various observations
  3. Theory vs Observations
    • Theory: A interpretation- a possible explination of why nature behaves in a certain way. Subjected to change
    • Observation: It is something witness and can be recorded
  4. Natural Law
    Consistent behavior that allows us to predicts the occurrence of this behavior of the future, such as change of state
  5. Conservation of mass
    An observation that the total mass of materials is not affected by a chemical change
  6. How to identify largest to greatest with scientific notation
    • 2.1 X 10x
    • Compare the poswer of 10x
    • Then compare the number 2.1
  7. Kilo, centi, milli (value and SN)
    • Kilo - 1,000 or 103
    • Centi - 0.01 or 10-2
    • Milli - 0.001 or 10-3
  8. How many centimeters are in 1 inch?
    1 inch = 2.54 centimeters
  9. Sig Figs when multiplying or dividing
    Result has the same number of SF's as the smallest number of SF's
  10. SF rules to adding or subtracting
    Result is limited by the uncertainty provided by the measurement
  11. TF and Tc conversions
    • TF= 1.80(Tc) +32.00
    • Tc= (TF- 32.00)/1.80
  12. Conversion factor for density?
    Density = Mass/Volume
  13. Volis
    1/10th trillion volume of an atom
  14. What does # of Proton, Electron, and Neutron determine?
    • Neutrons determine different isotopes of an atom
    • Protons determine the element
    • Electrons determine the atoms charge
  15. What are the 7 diatomic molecules?
    • Hydrogen
    • Nitrogen
    • Oxygen
    • Fluorine 
    • Chlorine 
    • Bromine 
    • Iodine
  16. Cations and Anions
    • Cation: Ions with a positive charge
    • Anion: Ions that have a negative charge
  17. Allotrope
    Different forms of different elements
  18. 3 allotropes of carbon
    • Diamond
    • Graphite 
    • Buckminsterfullerence
  19. Electrolytes
    • Substance that dissolver in water to form a solution that conducts well
    • Break up into component ions (atoms with electrical charge)
  20. Poor conductor of electricity
    • Most pure substance 
    • exception of graphite and metals

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