Answers NY-Chemistry Term 1 HillcrestMetallic Bonding

Metallic Bonding Answers

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

ductility

thermal conductivity

luster

electrical conductivity

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Which of the following metal atoms would have the highest conductivity?

the atom with the smallest radius and the fewest valence electrons

the atom with the smallest radius and the most valence electrons

the atom with the largest radius and the fewest valence electrons

the atom with the largest radius and the most valence electrons

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

Metal atoms are large and have high electronegativities.

Metal atoms are small and have low electronegativities.

Metal atoms are large and have low electronegativities.

Metal atoms are small and have high electronegativities.

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

The electrons are transferred to the innermost nuclei of metal atoms.

The electrons are transferred to the outermost nuclei of metal atoms.

The electrons are moving easily between the nuclei of metal atoms.

The electrons are in fixed positions between the nuclei of metal atoms.

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

copper

lithium

iodine

silicon

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

more valence electrons and larger atomic radius

fewer valence electrons and larger atomic radius

more valence electrons and smaller atomic radius

fewer valence electrons and smaller atomic radius

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

very hard

very brittle

poor conductivity

good conductivity

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

the loss of metallic properties

the formation of bands in a crystal

the loss of valence electrons to other atoms

the formation of localized valence electrons

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

Molecular orbitals overlap to form atomic orbitals in which the valence electrons of the atoms travel.

Molecular orbitals overlap to form atomic orbitals in which all electrons of the atoms travel.

Atomic orbitals overlap to form molecular orbitals in which the valence electrons of the atoms travel.

Atomic orbitals overlap to form molecular orbitals in which all electrons of the atoms travel.

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

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