AnswersISA CA-Chemistry ATypes of Chemical Bonds

Covalent Bonding Answers

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Which type of bond will form between two chlorine atoms?

A
an ionic bond
B
a metallic bond
C
a polar covalent bond
D
a nonpolar covalent bond
2
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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.
3

Which element has the greatest number of valence electrons available for bonding?

A
selenium
B
boron
C
calcium
D
chlorine
4

Which compound is an exception to the octet rule?

A
H2O
B
HCl
C
CCl4
D
ClF3
5

How many valence electrons are available for bonding in silicon?

A
four
B
five
C
eight
D
fourteen
6

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.
7

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
8

Which type of bond will most likely be found in HBr given that the electronegativity of hydrogen is 2.20 and the electronegativity of bromine is 2.96?

A
an ionic bond
B
a metallic bond
C
a polar covalent bond
D
a nonpolar covalent bond
9

Which structure shows the correct electron arrangement in CCl4?

A
A central upper C is single bonded to upper H above, below, and to the left, and single-bonded to upper C l to the right. The C l has three pairs of electron dots, above, right, and below.
Option A
B
A central upper C is single bonded to upper C l to the top, bottom, and left; those upper C l atoms have three pairs of electron dots on the sides away from the bond. The C is also single bonded to an upper H to the right.
Option B
C
A central upper C is single bonded to upper H above and below, and to upper C l to the left and right. The C l have three pairs of dots, above, below, and to the side opposite the bond.
Option C
D
A central upper C is single bonded to upper C l above, right, left, and below. All the C l atoms have 3 pair of electron dots, on the three sides that do not have the bond.
Option D
10

How many valence electrons are available for bonding in bromine (Br)?

A
one
B
two
C
five
D
seven

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