MCAT Chem Ch 1
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energy emitted as electromagnetic radiation from matter comes in ___
Discrete bundles called quanta

Atomic weight
Weighted average of different isotopes

Planck's constant
H=6.626 * 10E34 J*s

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

Angular momentum equation
L=nh/2pi

How does the angular momentum Vary?
With respect to principle quantum number

Electron jumping
Transfer of an amount of energy exactly equal to the difference between one orbit and another

At room temp, where are most electrons?
Ground state

Group of hydrogen emission lines corresponding to transitions from energy levels n >/ 2 to n=1
Lyman series

Group of hydrogen emission lines corresponding to transitions from energy levels n >/ 3 to n=2
Balmier series

Group of hydrogen emission lines corresponding to transitions from energy levels n >/ 4 to n=3
Paschen series

Heisenberg uncertainty principle
It is impossible to simultaneously determine with perfect accuracy the momentum and the position of an electron

Pauli exclusion principle
No two electrons in a given atom can possess the same set of four quantum numbers

Principle quantum number
N;
in each shell, 2n^2 can be held

Azimuthal quantum number (angular momentum quantum number)
 L
 fof a given value of n, only n1 is what l can be
refers to shape and dictates bond angles

Magnetic quantum number
Ml
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

Spin quantum number
Ms
+1/2 to 1/2

Aufbau principle
Building up principle
electrons fill from lower to higher

Hund's rule
Within a given subshell, orbitals are filled such that there a max number of half filled orbitals with parallel spins

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

Diamagnetic
Materials consisting of atoms that have paired electrons will be slightly repelled by a magnetic field