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Unit 4 Review 2022 Flashcards | StudBud
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Unit 4 Review 2022
Unit 4 Review 2022
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Questions
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Answers
1
What is the ABX formula for NH
3
?
AB4
AB3X2
AB3X
AB3
2
The difference in EN determines if the ______ is polar.
bond
molecule
3
The molecular geometry of covalent compounds is based on what theory?
VSEPR theory
NAS theory
Polarity theory
Lattice structure theory
4
What is the ABX formula for this substance?
AB4
AB4X8
AB3
AB3X8
5
What would be the dominant IMF of this substance?
London dispersion forces
dipole-dipole
ionic
hydrogen bonding
6
A ______ bond consists of 3 pairs of electrons
triple
double
single
7
Molecules with an even distribution around the central atom have the London dispersion force
False
True
8
In ionic bonding, _____ lose electrons to form _____
metals, cations
metals, anions
nonmetals, cations
nonmetals, anions
9
If a bond has a difference in EN of 1.5, how would you classify it?
polar covalent
nonpolar covalent
ionic
10
A polar molecule has an uneven distribution around the central atom.
False
True
11
Which is the best way to study for a chemistry test?
Asking your friends who took the test before you what's on it
Cramming for 5 hours the night before
Reading over the note packet and reworking problems a little bit every day
Reading over the note packet
12
Which type of molecule has either different elements or a lone pair on the central atom?
polar molecule
metallic molecule
nonpolar molecule
ionic
13
What would be the dominant IMF in this substance?
ionic
dipole-dipole
London dispersion forces
hydrogen bonding
14
What ionic compound would form between aluminum and bromine?
Al3Br
AlBr3
AlBr
Al2Br3
15
A group of covalently bonded atoms that carry an overall charge:
ionic compound
crystal lattice
alloy
polyatomic ion
16
What is the shape of this molecule?
bent
trigonal planar
trigonal pyramidal
triangular
17
In which type of bonding are valence electrons shared?
covalent
metallic
ionic
18
This type of bonding produces independent molecules
metallic
covalent
ionic
19
Which of the following is NOT a property of metallic bonds?
brittle
high melting points
mostly solids
high conductivity
20
What is the ABX formula for this structure?
AB4X4
AB4
AB8
AB4X8
21
How many valence electrons does boron have?
3
2
4
6
22
Which compound would form between sodium and nitrogen?
Na3N
NaN3
Na4N
NaN
23
For the molecule O
2
, how many total valence electrons are "Available" in the NAS method?
12
6
8
16
24
Which type of bonding involves only nonmetals?
metallic
ionic
covalent
25
The energy required to break a chemical bond is known as
atomic energy
potential energy
chemical energy
bond energy
26
Which compound would form between magnesium and sulfur?
MgS3
MgS2
Mg6S2
MgS
27
What is the needed value for boron?
5
6
3
8
28
Which of the following is NOT a property of ionic compounds?
mostly solids at room temperature
conduct electricity when molten
low melting and boiling points
mostly soluble in water
29
What is the shape of this molecule?
trigonal pyramidal
trigonal planar
tetrahedral
T-shaped
30
For the molecule O
2
, how many total valence electrons are "Needed" in the NAS method?
12
16
6
8
31
Ionic compounds have what kind of structure?
lattice structure
trigonal planar
sea of electrons
32
This type of bonding involves a sea of delocalized electrons
covalent
ionic
metallic
33
What would be the dominant IMF in this molecule?
London dispersion forces
ionic bonding
hydrogen bonding
dipole-dipole
34
What is the name of this molecule's shape?
tetrahedral
trigonal pyramidal
bent
linear
35
Which compound contains both ionic and covalent bonds?
NaCl
CH4
CaCO3
Cu
36
Which type of bonding involves a transfer of electrons?
covalent
metallic
ionic
37
For the molecule O
2
, how many total valence electrons are "Shared" in the NAS method?
6
8
4
2
38
How many valence electrons does carbon have?
14
4
6
12
