Name: 
 

Chapter 7 Online Practice


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

 1. 
If the ground state electron configuration of an element is [Ar]3d104s24p3, what is the typical charge on the monatomic anion of the element?
a.
2+
b.
1+
c.
1-
d.
2-
e.
3-
 

 2. 
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-
 

 3. 
Which of the following cations has four unpaired electrons in the ground state?
a.
Ni2+
b.
Fe2+
c.
Pb2+
d.
Mn2+
e.
Cu2+
 

 4. 
In general, atomic radii
a.
decrease down a group and remain constant across a period.
b.
decrease down a group and increase across a period.
c.
increase down a group and increase across a period.
d.
increase down a group and remain constant across a period.
e.
increase down a group and decrease across a period.
 

 5. 
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
 

 6. 
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
 

 7. 
Which one of the following statements is INCORRECT?
a.
Ionization energy is always a positive value.
b.
Ionization energy is the energy required to remove an electron from a gaseous atom.
c.
For any element, the second ionization energy is larger than the first ionization energy.
d.
Ionization energy decreases across a periodic of the periodic table.
e.
Ionization energy decreases down a group of the periodic table
 

 8. 
Which of the following chemical equations refers to the second ionization of Mg?
a.
Mg(s) + 2e- ® Mg2-(s)
b.
Mg(s) ® Mg+(s) + e-
c.
Mg(g) ® Mg2+(g) + 2e-
d.
Mg+(g) ® Mg2+(g) + e-
e.
Mg2+(g) + e- ® Mg+(g)
 

 9. 
Which of the following elements would have the greatest difference between the first and the second ionization energies?
a.
Mg
b.
Al
c.
K
d.
Ca
e.
Sr
 

 10. 
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
 

 11. 
The change in energy for the following reaction is referred to as the ____ for fluorine.

F(g) + e- ® F-(g)
a.
oxidation energy
b.
electron affinity
c.
electronegativity energy
d.
first ionization energy
e.
second ionization energy
 

 12. 
Which of the following elements has the most negative electron affinity?
a.
Li
b.
B
c.
C
d.
N
e.
F
 

 13. 
Which elements have no affinity for electrons?
a.
transition metals
b.
main group metals
c.
main group nonmetals
d.
semiconductors
e.
noble gases
 

 14. 
Which group of the periodic table of elements forms only 2+ ions?
a.
group 1A
b.
group 2A
c.
group 7B
d.
group 7A
e.
group 8A
 

 15. 
Place the following ions in order from smallest to largest ionic radii: P3-, K+, Na+, and Cl-.
a.
Na+ < K+ < Cl- < P3-
b.
K+ < Na+ < Cl- < P3-
c.
Cl- < P3- < Na+ < K+
d.
Cl- < P3- < K+ < Na+
e.
P3- < Cl- < K+ < Na+
 

 16. 
For an atom of a main group element, the number of valence electrons is equal to
a.
its number of core electrons.
b.
the principle quantum number of its outer shell.
c.
its period number.
d.
its group number.
e.
eight minus its group number.
 

 17. 
A silicon atom has ____ valence electrons.
a.
0
b.
2
c.
4
d.
6
e.
10
 



 
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