Chem 2: Lec 4

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  2. Law of Conservation of Energy
    - Energy can be neither created nor destroyed
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  4. Lightning occurs when electrons:
    move to neutralize charge difference between the storm clouds and earth
  5. Law of Definite Proportions
    A compound always has the same relative amounts of the elements that compose it
  6. Subatomic particles include:
    • 1. Electrons
    • -negatively charged subatomic particles found outside the nucleus
    • 2. Protons
    • -positively charged subatomic particles found in the nucleus
    • 4. Neutrons
    • -uncharged subatomic particles found in the nucleus
  7. Electron's charge and mass

  8. Cathode rays
    Stream of electrons
  9. Cations
    Lose Electron
  10. Anion
    - Gain electron
  11. Atomic Number (Z)
    • -Number of protons in the nucleus of an atom
    • -determines the identity of the atom
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  12. Isotopes
    atoms of an element with the same atomic number but different number of neutrons
  13. Mass number (A)
    Total number of protons and neutrons for an element
  14. Isotope notation
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  15. Neutron Number
    -the number of neutrons in the nucleus of an element's atoms

    N = A - Z
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  18. 1 amu =
    1.6606 x 10^-24g
  19. Average atomic mass
    Sum of the atomic mass of each isotope multiplied by its % abundance
  20. Average atomic mass of Cu
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Card Set:
Chem 2: Lec 4
2015-09-14 03:12:30

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