WCU CHEM 280 FINAL EXAM REVIEW QUESTIONS
WITH FULLY VERIFIED ANSWERS, GET IT 100%
ACCURATE
Bonding theories are used to predict how atoms bond together to form molecules. (T/F) - answer ✔✔-
TRUE
Drugs to fight HIV have been developed using bonding theory models (T/F) - answer ✔✔-TRUE
Li : is the proper Lewis structure (dot structure) for lithium. (T/F) - answer ✔✔-FALSE
A chemical bond is classified as a covalent bond if it involves the transfer of electrons. (T/F) - answer
✔✔-FALSE
The Lewis structure of oxygen should have 8 valence electrons. (T/F) - answer ✔✔-FALSE
Lewis structures only use the valence electrons in determining the bonding. (T/F) - answer ✔✔-TRUE
Having eight valence electrons is very stable and is called an octet. (T/F) - answer ✔✔-TRUE
A correct Lewis structure for an atom of carbon would have eight dots surrounding the symbol of the
element. (T/F) - answer ✔✔-FALSE
The correct Lewis structure for potassium in KCl is K+. (T/F) - answer ✔✔-TRUE
Chlorine has 8 valence electrons in the Lewis structure for KCl. (T/F) - answer ✔✔-TRUE
,The Lewis theory predicts that the formula for a compound of magnesium and sulfur is MgS2. (T/F) -
answer ✔✔-FALSE
The Lewis theory predicts that the formula for a compound made of sodium and fluorine is NaF. (T/F) -
answer ✔✔-TRUE
Lewis theory predicts that the formula for a compound made of aluminum and phosphorus is AlP. (T/F) -
answer ✔✔-TRUE
The Lewis structure of water has two sets of lone pair electrons. (T/F) - answer ✔✔-TRUE
The structure :H(-x3)H: is a proper representation of the bonding in the H2 molecule. (T/F) - answer
✔✔-FALSE
The Lewis structure for O2 contains a triple bond. (T/F) - answer ✔✔-FALSE
The double bond is shorter and stronger than a single bond. (T/F) - answer ✔✔-TRUE
The triple bond present in diatomic nitrogen, N2, is what makes this molecule so reactive. (T/F) - answer
✔✔-FALSE
When calculating the number of electrons for the Lewis structure of a polyatomic ion, subtract one
electron for each negative charge. (T/F) - answer ✔✔-FALSE
The correct Lewis structure for CO2 shows that the molecule contains two double bonds. (T/F) - answer
✔✔-TRUE
The correct Lewis structure for CO2 shows that the carbon atom has two sets of lone pair electrons.
(T/F) - answer ✔✔-FALSE
,When calculating the number of electrons for the Lewis structure of a polyatomic ion, you must add one
electron for each negative charge and subtract one electron for each positive charge. (T/F) - answer
✔✔-TRUE
The sulfate ion contains 28 valence electrons. (T/F) - answer ✔✔-FALSE
The ammonium ion contains 10 valence electrons. (T/F) - answer ✔✔-FALSE
Boron forms compounds that violate the octet rule. (T/F) - answer ✔✔-TRUE
Resonance structures are the best representation we can draw but do not accurately reflect the true
structure. (T/F) - answer ✔✔-TRUE
Carbon monoxide contains resonance Lewis structures. (T/F) - answer ✔✔-FALSE
The VSEPR theory predicts that the angle between the central carbon atom and the two oxygen atoms in
CO2 measures 180°. (T/F) - answer ✔✔-TRUE
The VSEPR theory predicts that the H-C-H angle in CH4 measures 120°. (T/F) - answer ✔✔-FALSE
It is important to identify lone pairs around a central atom because they do not repel other electron
groups. (T/F) - answer ✔✔-FALSE
The electron geometry of a molecule is never the same as its molecular geometry. (T/F) - answer ✔✔-
FALSE
When you have 2 electron groups and none are lone pairs, the molecular geometry is linear. (T/F) -
answer ✔✔-TRUE
When you have 4 electron groups and 1 of them is a lone pair, the molecular geometry is bent. (T/F) -
answer ✔✔-FALSE
, When you have 4 electron groups and none of them are lone pairs, the molecular geometry is trigonal
pyramidal. (T/F) - answer ✔✔-FALSE
When you have 4 electron groups, the electron geometry is tetrahedral. (T/F) - answer ✔✔-TRUE
The compound H2S contains polar bonds but the molecule is nonpolar. (T/F) - answer ✔✔-FALSE
Water and oil do not mix because water molecules are nonpolar and molecules that compose oil are
generally polar. (T/F) - answer ✔✔-FALSE
What is the angle between electron groups in the linear electron geometry? - answer ✔✔-180°
What is the angle between electron groups in the trigonal planar electron geometry? - answer ✔✔-120°
What is the angle between electron groups in the tetrahedral geometry? - answer ✔✔-109.5°
Which of the following is considered a single electron group?
A) a lone pair of electrons
B) a single bond
C) a double bond
D) a triple bond
E) all the above - answer ✔✔-all of the above
What is the electron geometry if you have 4 electron groups around the center atom? - answer ✔✔-
tetrahedral
What is the electron geometry if you have 2 electron groups around the center atom? - answer ✔✔-
linear
WITH FULLY VERIFIED ANSWERS, GET IT 100%
ACCURATE
Bonding theories are used to predict how atoms bond together to form molecules. (T/F) - answer ✔✔-
TRUE
Drugs to fight HIV have been developed using bonding theory models (T/F) - answer ✔✔-TRUE
Li : is the proper Lewis structure (dot structure) for lithium. (T/F) - answer ✔✔-FALSE
A chemical bond is classified as a covalent bond if it involves the transfer of electrons. (T/F) - answer
✔✔-FALSE
The Lewis structure of oxygen should have 8 valence electrons. (T/F) - answer ✔✔-FALSE
Lewis structures only use the valence electrons in determining the bonding. (T/F) - answer ✔✔-TRUE
Having eight valence electrons is very stable and is called an octet. (T/F) - answer ✔✔-TRUE
A correct Lewis structure for an atom of carbon would have eight dots surrounding the symbol of the
element. (T/F) - answer ✔✔-FALSE
The correct Lewis structure for potassium in KCl is K+. (T/F) - answer ✔✔-TRUE
Chlorine has 8 valence electrons in the Lewis structure for KCl. (T/F) - answer ✔✔-TRUE
,The Lewis theory predicts that the formula for a compound of magnesium and sulfur is MgS2. (T/F) -
answer ✔✔-FALSE
The Lewis theory predicts that the formula for a compound made of sodium and fluorine is NaF. (T/F) -
answer ✔✔-TRUE
Lewis theory predicts that the formula for a compound made of aluminum and phosphorus is AlP. (T/F) -
answer ✔✔-TRUE
The Lewis structure of water has two sets of lone pair electrons. (T/F) - answer ✔✔-TRUE
The structure :H(-x3)H: is a proper representation of the bonding in the H2 molecule. (T/F) - answer
✔✔-FALSE
The Lewis structure for O2 contains a triple bond. (T/F) - answer ✔✔-FALSE
The double bond is shorter and stronger than a single bond. (T/F) - answer ✔✔-TRUE
The triple bond present in diatomic nitrogen, N2, is what makes this molecule so reactive. (T/F) - answer
✔✔-FALSE
When calculating the number of electrons for the Lewis structure of a polyatomic ion, subtract one
electron for each negative charge. (T/F) - answer ✔✔-FALSE
The correct Lewis structure for CO2 shows that the molecule contains two double bonds. (T/F) - answer
✔✔-TRUE
The correct Lewis structure for CO2 shows that the carbon atom has two sets of lone pair electrons.
(T/F) - answer ✔✔-FALSE
,When calculating the number of electrons for the Lewis structure of a polyatomic ion, you must add one
electron for each negative charge and subtract one electron for each positive charge. (T/F) - answer
✔✔-TRUE
The sulfate ion contains 28 valence electrons. (T/F) - answer ✔✔-FALSE
The ammonium ion contains 10 valence electrons. (T/F) - answer ✔✔-FALSE
Boron forms compounds that violate the octet rule. (T/F) - answer ✔✔-TRUE
Resonance structures are the best representation we can draw but do not accurately reflect the true
structure. (T/F) - answer ✔✔-TRUE
Carbon monoxide contains resonance Lewis structures. (T/F) - answer ✔✔-FALSE
The VSEPR theory predicts that the angle between the central carbon atom and the two oxygen atoms in
CO2 measures 180°. (T/F) - answer ✔✔-TRUE
The VSEPR theory predicts that the H-C-H angle in CH4 measures 120°. (T/F) - answer ✔✔-FALSE
It is important to identify lone pairs around a central atom because they do not repel other electron
groups. (T/F) - answer ✔✔-FALSE
The electron geometry of a molecule is never the same as its molecular geometry. (T/F) - answer ✔✔-
FALSE
When you have 2 electron groups and none are lone pairs, the molecular geometry is linear. (T/F) -
answer ✔✔-TRUE
When you have 4 electron groups and 1 of them is a lone pair, the molecular geometry is bent. (T/F) -
answer ✔✔-FALSE
, When you have 4 electron groups and none of them are lone pairs, the molecular geometry is trigonal
pyramidal. (T/F) - answer ✔✔-FALSE
When you have 4 electron groups, the electron geometry is tetrahedral. (T/F) - answer ✔✔-TRUE
The compound H2S contains polar bonds but the molecule is nonpolar. (T/F) - answer ✔✔-FALSE
Water and oil do not mix because water molecules are nonpolar and molecules that compose oil are
generally polar. (T/F) - answer ✔✔-FALSE
What is the angle between electron groups in the linear electron geometry? - answer ✔✔-180°
What is the angle between electron groups in the trigonal planar electron geometry? - answer ✔✔-120°
What is the angle between electron groups in the tetrahedral geometry? - answer ✔✔-109.5°
Which of the following is considered a single electron group?
A) a lone pair of electrons
B) a single bond
C) a double bond
D) a triple bond
E) all the above - answer ✔✔-all of the above
What is the electron geometry if you have 4 electron groups around the center atom? - answer ✔✔-
tetrahedral
What is the electron geometry if you have 2 electron groups around the center atom? - answer ✔✔-
linear
