Chapter 31: Atomic Physics
Practice Questions



1.  

Who developed the "Exclusion Principle"?
Niels Bohr
Max Born
Werner Heisenberg
Wolfgang Pauli
Erwin Schrodinger

2.  

What is the energy of the n=3 quantum state of the hydrogen atom?
-9 eV
-4.5 eV
-1.5 eV
-.5 eV

3.  

What is the maximum angular momentum of the electron in question 2?
2.45 h/(2*pi)
3.00 h/(2*pi)
3.46 h/(2*pi)
4.47 h/(2*pi)

4.  

What is the maximum value for the z-component of the angular momentum in the above question?
3.00 h/2p
2.45 h/2p
2.00 h/2p
1.00 h/2p
0 h/2p

5.  

What is the energy of the electron in the ground state of doubly ionized Lithium, Li2+?
-13.6 eV
-40.8 eV
-100 eV
-122.4 eV

6.  

Estimate the energy of an electron in the ground state of Pb81+ lead with only 1 electron.
-13.6 KeV
-91 KeV
-1.1 KeV
-13.6 eV

7.  

How many electrons can go in the 3s subshell?
2
4
6
8

8.  

If the 3s and all inner subshells are filled, what is the element?
He
Be
Na
Mg

9.  

How many electrons can go into the 3p subshell?
4
6
8
10

10.  

How many electrons can go into the 3d subshell? (Actually the 4s subshell usually fills before the 3d subshell.)
4
6
8
10

11.  

Which of the following electron configurations is not allowed?
A:1s22s22p62d1
B:1s22s22p63s23p5
C:1s22s22p63s23p44s1
D:1s22s22p63s23p64s2
A
B
C
D

12.  

Which of the configurations in question 11 is allowed but would correspond to an excited state?
A
B
C
D

13.  

Which of the following describes the Brackett series?
(In metric units)
1/l=1.097x107(1/12-1/n2)
1/l=1.097x107(1/22-1/n2)
1/l=1.097x107(1/32-1/n2)
1/l=1.097x107(1/42-1/n2)
1/l=1.097x107(1/52-1/n2)

14.  

What is the minimum value for n in the answer for the previous question?
1
2
3
4
5

15.  

Which of the following describes the Balmer series?
1/l=1.097x107(1/12-1/n2)
1/l=1.097x107(1/22-1/n2)
1/l=1.097x107(1/32-1/n2)
1/l=1.097x107(1/42-1/n2)
1/l=1.097x107(1/52-1/n2)

16.  

Which of the following describes the Lyman series?
1/l=1.097x107(1/12-1/n2)
1/l=1.097x107(1/22-1/n2)
1/l=1.097x107(1/32-1/n2)
1/l=1.097x107(1/42-1/n2)
1/l=1.097x107(1/52-1/n2)

17.  

Which of the following describes the Paschen series?
1/l=1.097x107(1/12-1/n2)
1/l=1.097x107(1/22-1/n2)
1/l=1.097x107(1/32-1/n2)
1/l=1.097x107(1/42-1/n2)
1/l=1.097x107(1/52-1/n2)

18.  

What element has the configuration 1s2 2s22p1
B
Be
C
N
O

19.  

What element has the configuration 1s2 2s23s1
B
Be
C
N

20.  

Some manufacturers of laundry detergent advertized that their product made clothes "whiter than white". By which they mean that exposed to sun light they 'reflect' more visible light than they receive. This is an example of
Flourescence
Phosphorescence
false advertising
a violation of the Second Law of Thermodynamics

21.  


In the above figure what is the wavelength of the Kalpha X-ray line?
.02 nm
.05 nm
.06 nm
.1 nm

22.  

What is the atomic number of the element making up the metal target in the X-ray tube which produces the spectrum in the figure in question 13?
Z=41
Z=45
Z=46
Z=47
Z=50

23.  

What is the voltage on the X-ray tube in question 13?
45000 V
50000 V
55000 V
60000 V

24.  

If the voltage on the X-ray tube in question 13 is increased by 10000 V, what will be the new wavelength of the Kalpha X-ray?
.04 nm
.05 nm
.06 nm
.08 nm

25.  

Which of the following are necessary for a laser to work?
A) Boltzman Distribution
B) Inverted Population
C) Metastable State
A, B and C above
B and C above
A and B above.


Practice Questions: Practice Questions by Carl Adler, East Carolina University. ©2002 by Prentice Hall, Inc.


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