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Chemistry - 8 - Covalent Bonding Flashcards | StudBud
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Chemistry - 8 - Covalent Bonding
Chemistry - 8 - Covalent Bonding
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Review for a test on covalent bonding using questions adapted from the Prentice-Hall textbook.
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Questions
18
Answers
1
What is the shape of a water molecule?
trigonal
tetrahedral
pyramidal
bent triatomic
2
What is shown by the structural formula of a molecule?
number of ionic bonds
arrangement of bonded atoms
arrangement of metallic bonds
shapes of molecular orbitals
3
The number of valence electrons in a carbon atom?
2
0
4
8
4
According to VSEPR theory, molecules adjust their shape to keep what far apart?
inner shell electrons
mobile electrons
pairs of valence electrons
protons
5
The type of bond formed between two fluorine atoms.
ionic
very polar covalent
nonpolar covalent
moderately polar covalent
6
What causes dipole interactions?
attraction between polar molecules
sharing of electron pairs
bonding of bonded H atoms with an unshared electron pair
attraction between ions
7
Which type of solid has the highest melting point?
nonmetallic solid
network solid
ionic solid
metal
8
In which of the following compounds is the octet expanded to 10 electrons?
PCl5
H2S
PCl3
SF6
9
Which of these theories provides information about molecular shape and bonding?
VSEPR theory
molecular orbital theory
molecular shape theory
orbital hybridization theory
10
Which of these diatomic molecules is held together by triple covalent bonds?
oxygen
nitrogen
carbon
fluorine
11
Which noble gas has the same electron configuration as the oxygen in a water molecule?
helium
argon
neon
xenon
12
What causes hydrogen bonding?
attraction between ions
bonding of bonded H atoms with an unshared electron pair
attraction between polar molecules
sharing of electron pairs
13
number of unshared pairs of electrons around the carbon atom in methane (CH
4
)
4
1
0
2
14
Which of these elements exists as a diatomic molecule?
Ne
Xe
Ca
O
15
the number of valence electrons a carbon atom needs to gain to be stable
2
5
4
0
16
Which of the following atoms acquires the most negative charge in a bond with hydrogen?
C
K
O
S
17
Why do atoms share electrons in covalent bonds?
to attain the electron configuration of a noble gas
to increase their atomic number
to become more polar
to become ions to attract each other
18
How many covalent bonds do carbon atoms form?
3
2
4
1
