Quantum Theory

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1
de broglie
the electron can act like a wave or particle
2
excited state
higher energy levels than ground state
3
possible values for quantum number
1-7
4
electron dot notation
how many electrons are in the highest energy levels
5
Heisenberg-Uncertainity principle
not possible to measure the velocity and position of the electron exactly; waves are bigger than electron so it gives energy
6
wavelength
distance between 2 identical points on successive waves
7
photoelectric effect
einstein; energy is not continuous at all frequencies
8
electronmagnetic spectrum
forms of radiant energy that show wavelike behavior as it travels through space; forms of wave-both electrial and magnetic properties
9
unit of frequency
("v") 1/s=Hz or sˆ-1
10
planck
e=hv where h=6.626e-34 joules x seconds
11
quantum theory
(physics) a physical theory that certain properties occur only in disrete amounts (quanta)
12
shortcomings of the bohr model
cant work for any atoms except single electron atoms and ions; cant explain chemical bonds
13
schrödinger
electrons move around the nucleus as waves; electrons probably around nucleus; orbitals
14
ground state
state of lowest energy level of an atom
15
four quantum numbers
principle quantum number; orbital quantum number; magnetic quantum number; spin quantum number
16
general information provided by quantum numbers
energy level, shape, location, and electrons
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principal quantum number
n; main energy level; periods of the periodic table
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orbital quantum number
shapee of orbital; s,p,d,f
19
magnetic quantum number
orientation; x,y,z
20
orientations pur sublevel
s-1 p-3 d-5 f-7
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orbital
probable location of electron
22
aufbau principle
electrons enter the orbitals of the lowest energy first
23
Hund's rule
electrons are placed in seperate orbitals of the same energy before pairing up
24
paul exclusion principle
no 2 electrons in the same atom can have the same set of quantum numbers (opposite spins)
25
electron configuration
arrangement of electrons of an atom
26
quantum
finite quantity of energy in discrete units that are gained or lost by an atom
27
photon
particle or packets or particular energy
28
shapes
s-sphere; p-dumbell; d-4leaf clover and dumbell with donut; f 6leafed flower
29

amplitude
height of the wave
30
frequency
the number of waves that pass by a particular point in one second (cycles/second)
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