Answer Key - mychemistry.us

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Name ________________
Properties of Ionic and Metallic Substances
1. A hard substance that has a high melting point and is a
poor conductor of electricity in the solid phase could be
1) CO 2
2) Mg
3) NaCl
4) CCl4
2. A characteristic of ionic solids is that they
1)
2)
3)
4)
5. Metallic bonding occurs between atoms of
1) sulfur
2) copper
3) fluorine
4) carbon
6. Which element has a crystalline lattice composed of
positive ions through which electrons flow freely?
have high melting points
have low boiling points
conduct electricity
are non-crystalline
1) bromine
2) calcium
3. A solid substance is an excellent conductor of electricity.
The chemical bonds in this substance are most likely
1) ionic, because the valence electrons are shared
between atoms
2) ionic, because the valence electrons are mobile
3) metallic, because the valence electrons are
stationary
4) metallic, because the valence electrons are mobile
4. The high electrical conductivity of metals is primarily
due to
1)
2)
3)
4)
Date:_________________
3) carbon
4) sulfur
7. Which type of bonding involves positive ions immersed
in a sea of mobile electrons?
1) ionic
2) nonpolar covalent
3) polar covalent
4) metallic
8. Which substance is a good conductor of electricity in
both the solid and liquid phases?
1)
2)
3)
4)
high ionization energies
filled energy levels
mobile electrons
high electronegativities
Chemistry!
a metallic substance
an ionic substance
a network substance
a molecular substance
Answer Key
Properties of Metallic and Ionic Substances
1.
3
2.
1
3.
4
4.
3
5.
2
6.
2
7.
4
8.
1
Chemistry!
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