Chemistry Chapter 7B (Prentice)
 
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Chemistry Chapter 7B (Prentice)

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

 1. 

A compound held together by ionic bonds is called a ____.
a.
diatomic molecule
c.
covalent molecule
b.
polar compound
d.
salt
 

 2. 

Which of the following is true about an ionic compound?
a.
It is a salt.
c.
It is composed of anions and cations.
b.
It is held together by ionic bonds.
d.
all of the above
 

 3. 

How many valence electrons are transferred from the nitrogen atom to potassium in the formation of the compound potassium nitride?
a.
0
c.
2
b.
1
d.
3
 

 4. 

How many valence electrons are transferred from the calcium atom to iodine in the formation of the compound calcium iodide?
a.
0
c.
2
b.
1
d.
3
 

 5. 

What is the formula unit of sodium nitride?
a.
NaN
c.
Namc005-2.jpgN
b.
Namc005-1.jpgN
d.
NaNmc005-3.jpg
 

 6. 

What is the formula unit of aluminum oxide?
a.
AlO
c.
AlOmc006-2.jpg
b.
Almc006-1.jpgO
d.
Almc006-3.jpgOmc006-4.jpg
 

 7. 

What is the name of the ionic compound formed from lithium and bromine?
a.
lithium bromine
c.
lithium bromium
b.
lithium bromide
d.
lithium bromate
 

 8. 

What is the formula for sodium sulfate?
a.
NaSOmc008-1.jpg
c.
Na(SOmc008-4.jpg)mc008-5.jpg
b.
Namc008-2.jpgSOmc008-3.jpg
d.
Namc008-6.jpg(SOmc008-7.jpg)mc008-8.jpg
 

 9. 

Alloys are commonly used in manufacturing. Which of the following is NOT a reason to use an alloy instead of a pure metal?
a.
Bronze is tougher than pure copper.
c.
Brass is more malleable than pure copper.
b.
Sterling silver is stronger than pure silver.
d.
Cast iron is more brittle than pure iron.
 

 10. 

Which of the following compounds has the formula KNOmc010-1.jpg?
a.
potassium nitrate
c.
potassium nitrite
b.
potassium nitride
d.
potassium nitrogen oxide
 

 11. 

Which of the following pairs of elements is most likely to form an ionic compound?
a.
magnesium and fluorine
b.
nitrogen and sulfur
c.
oxygen and chlorine
d.
sodium and aluminum
 

 12. 

Ionic compounds are normally in which physical state at room temperature?
a.
solid
c.
gas
b.
liquid
d.
plasma
 

 13. 

Which of the following is true about the melting temperature of potassium chloride?
a.
The melting temperature is relatively high.
b.
The melting temperature is variable and unpredictable.
c.
The melting temperature is relatively low.
d.
Potassium chloride does not melt.
 

 14. 

What does the term coordination number in ionic crystals refer to?
a.
the total number of valence electrons in an atom
b.
the number of oppositely charged ions surrounding a particular ion
c.
the number of atoms in a particular formula unit
d.
the number of like-charged ions surrounding a particular ion
 

 15. 

Under what conditions can potassium bromide conduct electricity?
a.
only when melted
b.
only when dissolved
c.
only when it is in crystal form
d.
only when melted or dissolved in water
 

 16. 

Which of the following is NOT a characteristic of most ionic compounds?
a.
They are solids.
b.
They have low melting points.
c.
When melted, they conduct an electric current.
d.
They are composed of metallic and nonmetallic elements.
 

 17. 

Which of the following particles are free to drift in metals?
a.
protons
c.
neutrons
b.
electrons
d.
cations
 

 18. 

What is the basis of a metallic bond?
a.
the attraction of metal ions to mobile electrons
b.
the attraction between neutral metal atoms
c.
the neutralization of protons by electrons
d.
the attraction of oppositely charged ions
 

 19. 

What characteristic of metals makes them good electrical conductors?
a.
They have mobile valence electrons.
b.
They have mobile protons.
c.
They have mobile cations.
d.
Their crystal structures can be rearranged easily.
 

 20. 

An ionic bond is a bond between ____.
a.
a cation and an anion
c.
the ions of two different metals
b.
valence electrons and cations
d.
the ions of two different nonmetals
 

 21. 

A metallic bond is a bond between ____.
a.
the ions of two different metals
c.
valence electrons and cations
b.
a cation and an anion
d.
the ions of two different nonmetals
 

 22. 

In a hexagonal close-packed crystal, every atom (except those on the surface) has ____ neighbors.
a.
6
c.
12
b.
8
d.
10
 

 23. 

In a body-centered cubic crystal, every atom (except those on the surface) has ____ neighbors.
a.
10
c.
12
b.
6
d.
8
 

 24. 

In a face-centered cubic crystal, every atom (except those on the surface) has ____ neighbors.
a.
8
c.
12
b.
6
d.
10
 

 25. 

Which metallic crystal structure has a coordination number of 8?
a.
body-centered cubic
c.
hexagonal close-packing
b.
face-centered cubic
d.
tetragonal
 



 
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