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Chapter 6
Electron Structure of Atoms
14
Chemistry
Undergraduate 1
10/03/2011

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Term
Electron Stucture
Definition
Arrangement of Electrons in an atom
Term
Speed of Light
Definition
In a vacuum is 3.00x10^8m/s
in air is close to 3.0x10^8m/s
Term
Wavelength
Definition
Distance between successive peaks (expressed in M)
Term
Frequency
Definition
Number of waves that pass a given point in 1 second
Term
When solids are heated..
Definition
They emit radiation. the wavelenght depends on temperature
Term
Quantum
Definition
smallest quantity of energy emitted or absorbed as electromagnetic radiation
Term
E=hv
Definition
h=plancks constant
v=frequency
Term
Line Spectrum
Definition
a spectrum containing radiation of only specific wavelengths
Term
Bohr's model of a hydrogen Atom
Definition
electron could circle the nucleus of an atom only in orbits of certain specific nuclei. As n increases, the radius of orbit increases. as n increases E increase. n1=Ground state. N2= Excited state
Term
If electrons absorbs energy (from a photon)...
Definition
it can movw to ahigher energy state
Term
When an electron movess to a lower energy state
Definition
emits the excess energy as a photon
Term
Bohr's theory only works for what?
Definition
ions with a single electron/
Term
Louis De Broglie (nobel Prize 1929)
Definition
postulated that matter shows properties of waves
Term
Uncertainty Principle
Definition
at a subatomic level, it is inheretly impossible to know simultaneously both the exact momentum of a electron and its position in space. means only can give probability
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