Name: 
 

Practice Test #10 - Electron Configuration


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

 1. 
How many electrons can be described by the following quantum numbers: n = 4, l = 3, ml = -2, ms = +1/2?
a.
0
b.
1
c.
2
d.
3
e.
6
 

 2. 
How many electrons can be described by the quantum numbers n = 7, l = 1?
a.
0
b.
2
c.
6
d.
7
e.
14
 

 3. 
What is the maximum number of electrons that can occupy the n = 5 shell?
a.
5
b.
10
c.
14
d.
25
e.
50
 

 4. 
What is the maximum number of electrons that can occupy the n = 2 shell?
a.
4
b.
8
c.
18
d.
32
e.
50
 

 5. 
Which one of the following sets of quantum numbers is NOT allowed?
a.
n = 6, l = 0, ml = 0, ms = +1/2
b.
n = 5, l = 3, ml= 1, ms = +1/2
c.
n = 4, l = 2, ml = -3, ms = -1/2
d.
n = 3, l = 1, ml = -1, ms = +1/2
e.
n = 2, l = 0, ml = 0, ms = -1/2
 

 6. 
Which of the following elements is an s-block element?
a.
C
b.
Cd
c.
Cs
d.
Cl
e.
Cf
 

 7. 
Which element has the electron configuration 1s22s22p63s23p4?
a.
Mg
b.
S
c.
Si
d.
Se
e.
Ga
 

 8. 
What is the electron configuration for a lead atom?
a.
[Xe]6s26p2
b.
[Kr]5d106s26p2
c.
[Xe]4f145d106s26p2
d.
[Xe]5d106s26p2
e.
[Kr]4d104f145d2
 

 9. 
Hund's rule states that the most stable arrangement of electrons (for a ground state electron configuration)
a.
has a filled valence shell of electrons.
b.
has two electrons per orbital, each with identical spins.
c.
has ml values greater than or equal to zero.
d.
has the maximum number of unpaired electrons, all with the same spin.
e.
has two electrons per orbital, each with opposing spins.
 

 10. 
Which element has the following electron configuration?

practicetest9-elect_files/i0110000.jpg
a.
P
b.
S
c.
O
d.
N
e.
F
 

 11. 
Which element has the following electron configuration?

practicetest9-elect_files/i0120000.jpg
a.
Br
b.
Se
c.
S
d.
Cl
e.
Ge
 

 12. 
What is a possible set of quantum numbers for the unpaired electron in the orbital box diagram below?

practicetest9-elect_files/i0130000.jpg
a.
n = 3, l = 1, ml = -1, ms = +1/2
b.
n = 3, l = 2, ml = -1, ms = -1/2
c.
n = 3, l = 2, ml = -2, ms = +1/2
d.
n = 4, l = 0, ml = 0, ms = +1/2
e.
n = 4, l = 1, ml = -1, ms = +1/2
 

 13. 
Which 3+ ion has the ground state electron configuration [Kr]4d5?
a.
Ru
b.
Fe
c.
Ag
d.
Tc
e.
Nb
 

 14. 
What is the ground state electron configuration for Cr3+?
a.
[Ar]
b.
[Ar]3d34s2
c.
[Ar]3d44s1
d.
[Ar]3d3
e.
[Ar]3d74s2
 

 15. 
Which of the following ions have the same ground state electron configuration: Sn4+, Pb4+, Sr2+, and Br-?
a.
Sn4+ and Pb4+
b.
Pb4+ and Sr2+
c.
Sr2+ and Br-
d.
Pb4+ and Br-
e.
Sn4+, Sr2+, and Br-
 

 16. 
What 3- ion has the following ground state electron configuration?

practicetest9-elect_files/i0170000.jpg
a.
oxide ion
b.
nitride ion
c.
sodium ion
d.
aluminum ion
e.
phosphide ion
 

 17. 
What 1+ ion has the following ground state electron configuration?

practicetest9-elect_files/i0180000.jpg
a.
K+
b.
Rb+
c.
In+
d.
Tl+
e.
Y+
 

 18. 
Place the following atoms in order of increasing atomic radii: Ca, Mg, P, and Cl.
a.
Cl < P < Mg < Ca
b.
Mg < P < Cl < Ca
c.
Ca < Mg < P < Cl
d.
P < Cl < Mg < Ca
e.
Ca < Cl < P < Mg
 

 19. 
Place the following atoms in order of increasing atomic radii: Se, O, S, and As.
a.
O < S < Se < As
b.
O < S < As > Se
c.
As < Se < S < O
d.
Se < As < S < O
e.
S < As < O < Se
 

 20. 
Rank K, Li, and Cs in order of increasing first ionization energy.
a.
K < Cs < Li
b.
Cs < K < Li
c.
Cs < Li < K
d.
Li < Cs < K
e.
Li < K < Cs
 



 
Check Your Work     Reset Help