AnswersEO Night School Chemistry 7320AUnit Test

Types of Chemical Bonds Answers

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Consider the location of barium, chlorine, iodine, and strontium on the periodic table.ElectronegativitiesWhich type of atom has the strongest attraction for electrons in bond formation?

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A
barium (Ba)
B
chlorine (Cl)
C
iodine (I)
D
strontium (Sr)
2
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The table below shows the electronegativity values of various elements on the periodic table.ElectronegativitiesWhich pair of elements would form an ionic bond?

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A
carbon (C) and oxygen (O)
B
strontium (Sr) and chlorine (Cl)
C
cesium (Cs) and germanium (Ge)
D
magnesium (Mg) and aluminum (Al)
3

Sugar is made up of clear, colorless crystals that dissolve easily in water, but the crystals and their solution do not conduct electricity. Which statement describes sugar?

A
It is made up of atoms that are held together by metallic bonds.
B
It is made up of atoms that are held together by covalent bonds.
C
It is made up of atoms that are held together by weak ionic bonds.
D
It is made up of atoms that are held together by strong ionic bonds.
4

The incomplete table below shows selected properties of compounds that have ionic, covalent, or metallic bonds.RowBondElectrical conductivityLikely property1IonicYesHigh melting point2?Yes?3?No?Which information would best fill the blanks in row 3?

A
metallic bond and low melting point
B
metallic bond and high melting point
C
covalent bond and low melting point
D
covalent bond and high melting point
5

Which of these is a property of a substance that is composed of atoms that are held together by metallic bonds?

A
It has a low melting point.
B
It can be flattened and bent.
C
It cannot be shaped into wires.
D
It does not conduct electricity.
6

Which statement best explains why a metal atom and a nonmetal atom are most likely to form an ionic bond?

A
Metal atoms have low ionization energy, and nonmetal atoms have high electronegativity, so electrons transfer easily from the nonmetal atom to the metal atom.
B
Metal atoms have low ionization energy, and nonmetal atoms have high electronegativity, so electrons transfer easily from the metal atom to the nonmetal atom.
C
Metal atoms have high ionization energy, and nonmetal atoms have low electronegativity, so electrons transfer easily from the nonmetal atom to the metal atom.
D
Metal atoms have high ionization energy, and nonmetal atoms have low electronegativity, so electrons transfer easily from the metal atom to the nonmetal atom.
7

Which statement explains why the bonds between nonmetals tend to be covalent?

A
The bonds are found to be nondirectional.
B
They have large differences in electronegativity.
C
They have small differences in electronegativity.
D
They have ions that produce an electrostatic pull.
8

Which of these is a typical property of a substance that is composed of atoms that are held together by covalent bonds?

A
It conducts electricity when in solid form.
B
It conducts electricity when in molten form.
C
It conducts electricity when it is dissolved in water.
D
It does not conduct electricity in any form.
9

Which statement describes the valence electrons in ionic bonds?

A
They are shared equally between two atoms.
B
They are shared unequally between two atoms.
C
They are shared among many atoms.
D
They are transferred from one atom to another.
10

Which statement is generally true about CaCl2?

A
It has only metallic bonds between the atoms.
B
It has only covalent bonds between the atoms.
C
Its bonds are formed by large differences in electronegativity.
D
Its bonds are formed by small differences in electronegativity.

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Types of Chemical Bonds Answers — EO Night…