light unit 2

Question 1

electron in motion
free electron at rest
bound electron

Answer 1

energy greater than 0
energy=0
energy less than zero

Question 2

ground and excited state

Answer 2

Ground state: lowest energy
state of an atom.
* Excited state: when an atom
absorbs a photon

Question 3

determining the longest wavelength of light required to eject an electron

Answer 3

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

Question 4

what is light stream of…

Answer 4

particles

Question 5

energy of a photon is proportional to its..

Answer 5

frequency

Question 6

principle quantum number (n) restrictions and what is represent

Answer 6

n=1,2,3… to infinity
Describes the energy of the electron and the average distance from the nucleus.

Question 7

Azimuthal Quantum Number (l)

Answer 7

• 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

Question 8

Magnetic Quantum Number (ml)

Answer 8

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

Question 9

Spin Orientation Quantum number (ms)

Answer 9

Possible values: ms = + ½ (up) and – ½ (down)

Question 10

each orbital becomes smaller as nucleur charge…

Answer 10

increases

Question 11

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

Answer 11

more electrons ejected

Question 12

what energy transformation= shortest wavelength

Answer 12

shortest wavelength= highest energy.
so from n1 to n2

Question 13

The angular momentum quantum number, l, determines the

Answer 13

shape of an atomic orbital

Question 15

the greenhouse effect is..

Answer 15

atmosphere absorbing energy from the earth

Question 16

main reason CO2 is affecting global warming

Answer 16

its efficiency in absorbing infrared light