light unit 2 Flashcards
electron in motion
free electron at rest
bound electron
energy greater than 0
energy=0
energy less than zero
ground and excited state
Ground state: lowest energy
state of an atom.
* Excited state: when an atom
absorbs a photon
determining the longest wavelength of light required to eject an electron
since longest wavelength= lowest energy, we can use hvo given (make sure its kj/photon not per mol) and then use that value to plug wavelength=hc/E to find wavelength
what is light stream of…
particles
energy of a photon is proportional to its..
frequency
principle quantum number (n) restrictions and what is represent
n=1,2,3… to infinity
Describes the energy of the electron and the average distance from the nucleus.
Azimuthal Quantum Number (l)
- l = 0, 1, 2, 3, …, n-1,
- the value of l corresponds to an orbital shape
Value of l Subshell Label
0 s
1 p
2 d
3 f
Magnetic Quantum Number (ml)
Magnetic Quantum Number
* Orbitals described by an l-value can have different
orientations. Therefore, orbitals must have their
orientation described
* m l = 0, ±1, ±2, ±3,…±l
Spin Orientation Quantum number (ms)
Possible values: ms = + ½ (up) and – ½ (down)
each orbital becomes smaller as nucleur charge…
increases
if binding energy is 7.21E-10 and certain electrons are subjected to a photon source frequency 1.4E15, if intensity of photon source increase what would happen
more electrons ejected
what energy transformation= shortest wavelength
shortest wavelength= highest energy.
so from n1 to n2
The angular momentum quantum number, l, determines the
shape of an atomic orbital
the greenhouse effect is..
atmosphere absorbing energy from the earth
main reason CO2 is affecting global warming
its efficiency in absorbing infrared light