CH301 Fall 2010 Practice Exam1—TA Style
1. The signal from a radio station has a wavelength of 0.60 km. What is the frequency of a photon with this wavelength?
1. 5 × 10
10
Hz
2. 3.3 × 10
−25
Hz
3. 5 × 10
8
Hz
4. 3.3 × 10
−22
Hz
5. 5 × 10
5
Hz
2. Classically the energy contained in electromagnetic radiation is proportional to the (amplitude, frequency, wavelength),
whereas in quantum mechanics it is proportional to the (amplitude, frequency, wavelength).
1. amplitude; wavelength
2. frequency; wavelength
3. wavelength; amplitude
4. wavelength; frequency
5. amplitude; frequency
3. In a hydrogen atom which electronic transition would emit the longest wavelength of light?
1. n = 2 to n = 4
2. n = 5 to n = 4
3. n = 4 to n = 3
4. n = 2 to n = 1
5. n = 5 to n = 3
6. n = 1 to n = 2
4. In a onedimensional particle in a box, the zeropoint energy corresponds to.
..
1. a node.
2. n = 1.
3. a quantum state where the Uncertainty Principle is not valid.
4. n = 0.
5. Ψ
2
= 0.
5. Find the minimum uncertainty in the position of a cannon ball with a mass of 50,000 g with an uncertainty in velocity
of 100 m·s
−1
. (approximating should get you the right answer)
1. 1.05 × 10
−38
m
2. 1.05 × 10
−41
m
3. 2.10 × 10
−38
m
4. There is not enough information.
5. 4.52 × 10
−38
m
6. The average speed of a helium atom at 25 °C is 1.23 × 10
3
m·s
−1
. What is the average wavelength of a helium atom at
this temperature? (trickier than 5, but still doable without a calculator)
1. 4.15 × 10
−12
m
2. 2.03 × 10
−11
m
3. 7.43 × 10
−15
m
4. 8.11 × 10
−11
m
5. 4.06 × 10
−11
m
7. Which of the following applications of the Schrodinger equation includes a potential energy term with both attractive
and repulsive terms?
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document1.
V
(
r
) for the electron in the hydrogen atom
2.
V
(
x
) for the standing wave of a plucked guitar string
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '10
 Laude
 Atom, Electron, CaO, NaF

Click to edit the document details