Covalent Bonding Answers

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What is the best reason for the difference in properties of LiCl and C6H14O?

A
LiCl and C6H14O have different atomic masses.
B
Cl and O belong to different groups of the periodic table.
C
One compound is ionic, and the other is metallic.
D
One compound is covalent, and the other is ionic.
4

A solid compound in a sealed container was kept at a very low temperature in a freezer. When placed at room temperature, the substance quickly turned into a liquid. This compound is most likely which of the following?

A
an ionic compound because it has a low boiling point
B
a covalent compound because it has a low boiling point
C
an ionic compound because it has a low melting point
D
a covalent compound because it has a low melting point
6

Some atoms are exceptions to the octet rule by having an expanded octet. Which characteristic is needed for an atom to have an expanded octet?

A
The atom has empty d-orbitals.
B
The atom has more than eight valence electrons before bonding.
C
The atom has empty p-orbitals.
D
The atom has fewer than eight valence electrons after bonding.
7

Which statement describes a property of covalent compounds?

A
They have a high boiling point because of strong intermolecular forces.
B
They have a low boiling point because of weak intermolecular forces.
C
They have a low melting point because of strong intermolecular forces.
D
They have a high melting point because of weak intermolecular forces.
8

Which statement about covalent compounds is true?

A
They are able to melt at high temperatures.
B
They are poor conductors of heat.
C
They have strong intermolecular attractions.
D
They have atomic bonds that are easy to break.
9

Which pair of elements will form a covalent bond?

A
hydrogen and chlorine
B
sodium and chlorine
C
copper and bromine
D
zinc and bromine
10

Which characteristic best explains the difference in melting behavior of covalent substances and ionic substances?

A
Ionic substances have weaker intermolecular attractions.
B
Ionic substances usually have stronger atomic bonds.
C
Covalent substances have weaker intermolecular attractions.
D
Covalent substances usually have stronger atomic bonds.

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