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Chem Honors Chapter 4


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Heinsberg Uncertainty principle
It is impossible to determine both position and veolocity of an electron or any other particle at the same time
Schrodinger wave equation
give a probability of finding an electron and its velocity at a given place around the nucleus
Principal Quantum number
n, all possible values, indicates main energy level occupied by the elctron shell
total number of orbitals in a shell
Angular Momentum Quantum number
l, indicates shape of orbital, diff shapes l=0->l=n-1
Magnetic Quantum numb
m, orientation,
Spin number
s +-.5
matter exhibits wave-like properties (dual particle-wave) nature
Characteristics of waves
Interference: interaction of waves travelling thru the same medium
Diffraction:Bending of waves
Characteristics of Particles
1)Photo electric effect
2)Emission of light by hot objects
Speed of light
3*10^8 m/s
visible spectrum
400-700 nm
llamada, distance between crests (tops),troghs(bottoms)
numb of waves that pass a given pt per second (V thing)
speed emr
how fast a given peak is moving thru space
Planck (add on)
said quantized nrg
h= constant
distance from middle of wave to peak
one wave/s
photo electric effect
emission of electrons from a metal when lite shines on it.
Afbau's Principle
Electrons tend to occupy the lowest lvs first
Hund's Rule
Pairing of electrons in the orbitals of the same energy does not occur until every orbital of the SAME energy has at least 1 electron
Pauli Exclusion Principle
No 2 electrons within an atom can have all 4 quantun numbers the same

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