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Chapter 6 Electronic structure of  Atoms

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
Electromagnetic radiation travels through vacuum at a speed of __________ m/s.
a.
186,000
b.
125
c.
3.00 ´ 108
d.
10,000
e.
It depends on wavelength.
 

 2. 
The wavelength of light that has a frequency of 1.20 ´ 1013 s-1 is __________ m.
a.
25.0
b.
2.50 ´ 10-5
c.
0.0400
d.
12.0
e.
2.5
 

 3. 
The energy of a photon of light is __________ proportional to its frequency and __________ proportional to its wavelength.
a.
directly, directly
b.
inversely, inversely
c.
inversely, directly
d.
directly, inversely
e.
indirectly, not
 

 4. 
Of the following, __________ radiation has the shortest wavelength.
a.
X-ray
b.
radio
c.
microwave
d.
ultraviolet
e.
infrared
 

 5. 
A mole of red photons of wavelength 725 nm has __________ kJ of energy.
a.
2.74 ´ 10-19
b.
4.56 ´ 10-46
c.
6.05 ´ 10-3
d.
165
e.
227
 

 6. 
It takes 254 kJ/mol to eject electrons from a certain metal surface. What is the longest wavelength of light (nm) that can be used to eject electrons from the surface of this metal via the photoelectric effect?
a.
471
b.
233
c.
165
d.
725
e.
552
 

 7. 
Of the following transitions in the Bohr hydrogen atom, the __________ transition results in the emission of the highest-energy photon.
a.
n = 1 ® n = 6
b.
n = 6 ® n = 1
c.
n = 6 ® n = 3
d.
n = 3 ® n = 6
e.
n = 1 ® n = 4
 

 8. 
When the electron in a hydrogen atom moves from n = 6 to n = 2, light with a wavelength of __________ nm is emitted.
a.
93.8
b.
434
c.
487
d.
657
e.
410
 

 9. 
The __________ quantum number defines the shape of an orbital.
a.
spin
b.
magnetic
c.
principal
d.
azimuthal
e.
psi
 

 10. 
The __________ subshell contains only one orbital.
a.
5d
b.
6f
c.
4s
d.
3d
e.
1p
 

 11. 
The azimuthal quantum number is 3 in __________ orbitals.
a.
s
b.
p
c.
d
d.
f
e.
a
 

 12. 
__________-orbitals are spherically symmetrical.
a.
s
b.
p
c.
d
d.
f
e.
g
 

 13. 
Each p-subshell can accommodate a maximum of __________ electrons.
a.
6
b.
2
c.
10
d.
3
e.
5
 

 14. 
The 4d subshell in the ground state of atomic xenon contains __________ electrons.
a.
2
b.
6
c.
8
d.
10
e.
36
 

 15. 
There are __________ unpaired electrons in a ground state phosphorus atom.
a.
0
b.
1
c.
2
d.
3
e.
4
 

 16. 
The ground state electron configuration for Zn is __________.
a.
[Kr]4s23d10
b.
[Ar]4s23d10
c.
[Ar]4s13d10
d.
[Ar]3s23d10
e.
[Kr]3s23d10
 

 17. 
All of the __________ have a valence shell electron configuration ns1.
a.
noble gases
b.
halogens
c.
chalcogens
d.
alkali metals
e.
alkaline earth metals
 

 18. 
The photoelectric effect is __________.
a.
the total reflection of light by metals giving them their typical luster
b.
the production of current by silicon solar cells when exposed to sunlight
c.
the ejection of electrons by a metal when struck with light of sufficient energy
d.
the darkening of photographic film when exposed to an electric field
e.
a relativistic effect
 

 19. 
Which one of the following is the correct electron configuration for a ground-state nitrogen atom?
a.

mc019-1.jpg
b.

mc019-2.jpg
c.

mc019-3.jpg
d.

mc019-4.jpg
e.
None of the above is correct.
 

 20. 
The ground state electron configuration of Fe is __________.
a.
1s22s23s23p63d6
b.
1s22s22p63s23p63d64s2
c.
1s22s22p63s23p64s2
d.
1s22s22p63s23p64s24d6
e.
1s22s23s23p10
 

 21. 
Which two elements have the same ground-state electron configuration?
a.
Pd and Pt
b.
Cu and Ag
c.
Fe and Cu
d.
Cl and Ar
e.
No two elements have the same ground-state electron configuration.
 



 
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