MCAT Chem Ch 1

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  1. energy emitted as electromagnetic radiation from matter comes in ___
    Discrete bundles called quanta
  2. Atomic weight
    Weighted average of different isotopes
  3. Planck's constant
    H=6.626 * 10E-34 J*s
  4. Centripetal force acting on the electron as it revolved around the nucleus was ___
    Created by the electrostatic force between the positively charged proton and the negatively charged electron
  5. Angular momentum equation
  6. How does the angular momentum Vary?
    With respect to principle quantum number
  7. Electron jumping
    Transfer of an amount of energy exactly equal to the difference between one orbit and another
  8. At room temp, where are most electrons?
    Ground state
  9. Group of hydrogen emission lines corresponding to transitions from energy levels n >/ 2 to n=1
    Lyman series
  10. Group of hydrogen emission lines corresponding to transitions from energy levels n >/ 3 to n=2
    Balmier series
  11. Group of hydrogen emission lines corresponding to transitions from energy levels n >/ 4 to n=3
    Paschen series
  12. Heisenberg uncertainty principle
    It is impossible to simultaneously determine with perfect accuracy the momentum and the position of an electron
  13. Pauli exclusion principle
    No two electrons in a given atom can possess the same set of four quantum numbers
  14. Principle quantum number

    in each shell, 2n^2 can be held
  15. Azimuthal quantum number (angular momentum quantum number)
    • L
    • fof a given value of n, only n-1 is what l can be

    refers to shape and dictates bond angles
  16. Magnetic quantum number

    where an electron i most likely to be found at a given moment in time

    each orbital can hold a max of two electrons

     Values are -l to +l
  17. Spin quantum number

    +1/2 to -1/2
  18. Aufbau principle
    Building up principle

    electrons fill from lower to higher
  19. Hund's rule
    Within a given subshell, orbitals are filled such that there a max number of half filled orbitals with parallel spins
  20. Paramagnetic
    Materials composed of atoms with unpaired electrons will quickly orient their spins in alignment with a magnetic field, and the material wI'll thus be weakly attracted to the magnetic field
  21. Diamagnetic
    Materials consisting of atoms that have paired electrons will be slightly repelled by a magnetic field

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MCAT Chem Ch 1
2015-05-30 16:10:26
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