AnswersNY-Chemistry Term 1 HillcrestMetallic Bonding

Metallic Bonding Answers

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1
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Which property is better explained by the band theory than by the sea-of-electrons model?

A
ductility
B
thermal conductivity
C
luster
D
electrical conductivity
2
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Which of the following metal atoms would have the highest conductivity?

A
the atom with the smallest radius and the fewest valence electrons
B
the atom with the smallest radius and the most valence electrons
C
the atom with the largest radius and the fewest valence electrons
D
the atom with the largest radius and the most valence electrons
3

Which characteristics of metal atoms help explain why valence electrons in a metal are delocalized?

A
Metal atoms are large and have high electronegativities.
B
Metal atoms are small and have low electronegativities.
C
Metal atoms are large and have low electronegativities.
D
Metal atoms are small and have high electronegativities.
4

The diagram is a representation of the electron sea model. Which statement best describes what is happening in this model?

Question illustration
A
The electrons are transferred to the innermost nuclei of metal atoms.
B
The electrons are transferred to the outermost nuclei of metal atoms.
C
The electrons are moving easily between the nuclei of metal atoms.
D
The electrons are in fixed positions between the nuclei of metal atoms.
5

Which element is likely to be the best conductor of electricity?

A
copper
B
lithium
C
iodine
D
silicon
6

Which combination of factors is most suitable for increasing the electrical conductivity of metals?

A
more valence electrons and larger atomic radius
B
fewer valence electrons and larger atomic radius
C
more valence electrons and smaller atomic radius
D
fewer valence electrons and smaller atomic radius
7

Which property does a metal with a large number of free-flowing electrons most likely have?

A
very hard
B
very brittle
C
poor conductivity
D
good conductivity
8

Which is most likely the result of millions of metal atoms crowding together so that molecular orbitals become combined?

A
the loss of metallic properties
B
the formation of bands in a crystal
C
the loss of valence electrons to other atoms
D
the formation of localized valence electrons
9

Which statement best describes the basis of the band theory of metallic bonding?

A
Molecular orbitals overlap to form atomic orbitals in which the valence electrons of the atoms travel.
B
Molecular orbitals overlap to form atomic orbitals in which all electrons of the atoms travel.
C
Atomic orbitals overlap to form molecular orbitals in which the valence electrons of the atoms travel.
D
Atomic orbitals overlap to form molecular orbitals in which all electrons of the atoms travel.
10

Which is the best metal to use in an alloy to increase its electrical conductivity?

A
Al
B
Cu
C
Li
D
Sb

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