

Symbol for wavelength?
lambda

Speed of light?
3.00 x 10^{8} m/s

Relationship between wavelength and frequency?
c = (wavelength)(frequency)

EM Radiation Experiments? (hint: 3)
  Blackbody Radiation
  Photoelectric Effect
  Emmission Spectrum of gases

Blackbody Radiation?
 ~ EM Radiation comes from objects that have been heated
 ~ high frequency, (short wavelength) has a high energy
  the inverse is also true 

Planck's Constant (h)
6.626 x 10^{34} J*s

Photoelectric Effect?
 tiny packets of light, photons, have own unique energy
 E_{photon} = hv
 photons behave like particles and like waves (duality)

Emission Spectrum of Gases?
 Excited atoms emit light at discrete wavelengths
 every atom gives unique emission spectrum
 E = hc/lambda

principle quantum number n
 "orbits" of specific size where the energy of the electrons depends on n
 lower n = lower E and the orbit is closer to the nucleus

what causes the "lines" in emission spectra?
 When an electron falls back to the ground state from an excited state the E emitted as a quantum of light, or photon.
 this photon represents the "lines".

The amount of E absorbed or emitted in promoting or demoting electrons within allowed n levels
Change in E = E_{f}  E_{i} = [(R_{H}/n^{2}_{f})  (R_{H}/n^{2}_{i})]

Rydberg constant
R_{H} = 2.18 x 10^{18}J

Based on the equation, if the change in E is less than 0 and E is given off this is an
emission spectrum

Based on the equation, if the change in E is greater than 0 and E is absorbed this is an
absorption spectrum

Based on the equation, if the final energy level is infinity, the electron has been removed completely
ionization energy

What is the relationship between mass and wavelength?
wavelength = h/mass x velocity

Heisenberg's Uncertainty Principle
uncertainty in position x energy (or momentum) is greater than or equal to h/4 pie

wave function
the mathematical equation that describes the electrons

Angular Momentum Quantum Number (l)
 defines the shape of the orbital
 range from 0 to n1
 we use letter designations in place of l

