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31 Cards in this Set
- Front
- Back
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thompson model
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plum pudding model
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rutherford model
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- small, dense, and charged nucleus
- electrons orbit around |
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bohr model
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electrons move around the nucleus in fixed spherical orbits with fixed energies.
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quantum mechanics model
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Erwin Schrodiner and his math equation
the complicated one |
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can electrons be between energy levels in the bohr model?
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no
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Atomic Emission Spectra
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when atoms absorb energy, they move to higher energy level...the electrons emit light when they return back to a lower energy level.
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how do you see the emission spectra?
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pass the light through a slit then a prism.
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amplitude
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height
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wavelength
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distance between crests of the wave.
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frequency
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#of waves per unit time
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to find wavelength/frequency
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C=/~V
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speed of light?
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2.998E8 m/s
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Quantum Numbers
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used to describe the location of electrons.
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how many quantum numbers can you have? can you have the same set of number for different electrons?
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4; no
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Principal quantum number
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energy level
n positive integer |
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Angular Momentum Quantum Number
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energy sub-level
n-1 l shape of orbital |
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l=0
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s, spherical cloud
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l=1
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p, dumbbell cloud
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l=2
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d, clover cloud
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l=3
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f, too complicated
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magnetic quantum number
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Ml
spatial orientation -l to +l |
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number of orbitals in in energy level
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n^2
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each orbital holds
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2 electrons
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total number of electrons
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2n^2
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spin quantum number
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Ms
direction of spin 1/2 or -1/2 |
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aufbau principle
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lowest energy level first
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pauli exclusion
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opposite spin
2 per room |
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hunds rule
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1 first, then 2
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planks constant (h)
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6.626e-34Js
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e=
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energy (joules- J)
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v=
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frequency hz, or s-1
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