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Chemistry I - Chapter 8
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The Greek letter _____ represents a partial charge on an atom.
delta
True or False: The bond between atoms is stronger than the bond between molecules.
 
true
 
false
True or False: Nonpolar compounds can dissolve in polar substances.
 
false
 
true
True or False: Ionic compounds can dissolve in polar substances.
 
true
 
false
True or False: Molecules with only nonpolar bonds must be nonpolar as well.
 
false
 
true
True or False: Molecules with only polar bonds must be polar as well.
 
false
 
true
A polar molecule must have a ________ and a ________ side.
positive and negative
If the electronegativities differ from __ to __, the bond is ionic.
1.7 to 3+
If the electronegativities differ from __ to __, the bond is polar covalent.
0.4 to 1.7
If the electronegativities differ from __ to __, the bond is nonpolar covalent.
0 to 0.4
Equal sharing of electrons between two atoms creates a _____ bond.
nonpolar
Unequal sharing of electrons between two atoms creates a _____ bond.
polar
What type of compounds are soluble in water?
polar and ionic
What type of compounds are soluble in nonpolar substances?
nonpolar
Electronegativity _________ as you move down and to the left on the periodic table.
decreases
Electronegativity _________ as you move up and to the right on the periodic table.
increases
Which family has no electronegativity?
noble gases
Which element has the highest electronegativity?
fluorine
____________ is the tendency of an atom to attract electrons.
electronegativity
_________ structures are two or more valid Lewis structures for one molecule.
resonance
Which element is always the terminal atom in a molecule?
hydrogen
Name this formula: SF6
sulfur hexafluoride
Name this formula: PCl5
phosphorous pentachloride
Name this formula: ClF3
chlorine trifluoride
Name this formula: N2O2
dinitrogen dioxide
Name this formula: CO2
carbon dioxide
Name this formula: CO
carbon monoxide
An acid with an oxyanion ending in -ite turns into an -____ acid.
-ous
An acid with an oxyanion ending in -ate turns into an -____ acid.
-ic
A ______ acid only contains two elements.
binary
When naming the first element in a formula, you do not use the prefix _____.
mono-
The prefix ____ means nine.
nona-
The prefix ____ means four.
tetra-
The prefix ____ means one.
mono-
The second element in the formula of a binary compound has the suffix ____.
-ide
Covalent bonds typically occur between a nonmetal and a ________.
nonmetal
Adding a pi bond to a sigma bond makes the overall bond between two atoms...
 
shorter
 
longer
 
more flexible
The ________ the bond, the stronger the bond.
 
shorter
 
longer
In what form do elements such as hydrogen, nitrogen, and oxygen normally occur?
 
as molecules containing two atoms
 
as molecules containing three atoms
 
as molecules containing four atoms
 
as single atoms
________ molecules include elements such as hydrogen, nitrogen, and oxygen.
diatomic
More than one pair of electrons shared between two atoms is called a _____ bond.
pi
One pair of electrons shared between two atoms is called a _____ bond.
sigma
When two or more atoms bond by sharing electrons, the product is called a ________.
molecule
When a bond breaks, the energy is released. This is called a(n) __________ reaction.
exothermic
When electrons are shared, the attachment between atoms is called a ________ ____.
covalent bond
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