CEM 141 MSU FINAL EXAM (2026-2027)
QUESTIONS AND ANSWERS GRADED A+
The electrostatic force would become stronger
How would the strength of the electrostatic force change if the distance between
the two charged objects decreased?
a. The electrostatic force would become stronger
b. The electrostatic force would become weaker
c. The electrostatic force would become stronger or weaker depending on whether
the force is attractive or repulsive.
d. It is impossible to say from the information given.
True because an element is made up of one type of atom. Nitrogen is an element
that exists as diatomic molecules.
Consider the following statement: "A nitrogen molecule is made up of the same
type of atoms." Is this statement true or false and why?
I. True
II. False
III. An element is made up of one type of atom. Nitrogen is an element that exists
as diatomic molecules.
IV. Nitrogen is a compound that exists as diatomic molecules. Compounds are
made of different types of atoms.
V. Nitrogen is an element and therefore must exist as separate atoms and not
molecules.
,Because the repulsive force between the overlapping electron clouds is dominant
Why does the potential energy increase as two xenon atoms move extremely close
together?
a. Because the kinetic energy decreases as the atoms slow down.
b. Because the electrostatic attractive force from the instantaneous dipoles is
dominant.
c. Because the repulsive force between the overlapping electron clouds is
dominant.
d. Because there is more potential energy than kinetic energy when the atoms are
close together.
The partial positive end of one atom's instantaneous dipole attracts the partial
negative end of the neighboring atom's induced dipole.
Which statement best describes the forces that exist between helium atoms in the
solid state?
a. The electron cloud on one helium atom is attracted to the electron cloud on the
other atom.
b. The nucleus of one helium atom is repelled by the nucleus of the neighboring
atom.
c. The helium atoms share electrons, forming a bond.
d. The partial positive end of one atom's instantaneous dipole attracts the partial
negative end of the neighboring atom's induced dipole.
e. Both atoms have mass, so they are attracted to each other by gravitational forces.
Energy is released
, A molecule is formed
When a covalent bond is formed between two nitrogen atoms:
I. Energy is absorbed
II. Energy is released
III. A molecule is formed
IV. The nitrogen changes from the gaseous to the liquid state.
Weaker because neon has a smaller electron cloud, therefore there will be a smaller
separation of charge resulting in a weaker force.
The London dispersion force between two neon atoms compared to the London
dispersion force between two argon atoms where both systems are the most stable
is:
I. The same
II. Stronger
III. Weaker
Because:
IV. They are both noble gasses
V. Neon has a smaller electron cloud, therefore there will be a smaller separation
of charge resulting in a weaker force.
VI. Neon has a smaller electron cloud, therefore there will be a larger separation of
charge resulting in a stronger force.
Yes because it can be tested and answered though observations and experiments
Consider the question: Is there an attractive force between a pencil and the earth?
Is this a scientific question? [Yes or No]
Because
QUESTIONS AND ANSWERS GRADED A+
The electrostatic force would become stronger
How would the strength of the electrostatic force change if the distance between
the two charged objects decreased?
a. The electrostatic force would become stronger
b. The electrostatic force would become weaker
c. The electrostatic force would become stronger or weaker depending on whether
the force is attractive or repulsive.
d. It is impossible to say from the information given.
True because an element is made up of one type of atom. Nitrogen is an element
that exists as diatomic molecules.
Consider the following statement: "A nitrogen molecule is made up of the same
type of atoms." Is this statement true or false and why?
I. True
II. False
III. An element is made up of one type of atom. Nitrogen is an element that exists
as diatomic molecules.
IV. Nitrogen is a compound that exists as diatomic molecules. Compounds are
made of different types of atoms.
V. Nitrogen is an element and therefore must exist as separate atoms and not
molecules.
,Because the repulsive force between the overlapping electron clouds is dominant
Why does the potential energy increase as two xenon atoms move extremely close
together?
a. Because the kinetic energy decreases as the atoms slow down.
b. Because the electrostatic attractive force from the instantaneous dipoles is
dominant.
c. Because the repulsive force between the overlapping electron clouds is
dominant.
d. Because there is more potential energy than kinetic energy when the atoms are
close together.
The partial positive end of one atom's instantaneous dipole attracts the partial
negative end of the neighboring atom's induced dipole.
Which statement best describes the forces that exist between helium atoms in the
solid state?
a. The electron cloud on one helium atom is attracted to the electron cloud on the
other atom.
b. The nucleus of one helium atom is repelled by the nucleus of the neighboring
atom.
c. The helium atoms share electrons, forming a bond.
d. The partial positive end of one atom's instantaneous dipole attracts the partial
negative end of the neighboring atom's induced dipole.
e. Both atoms have mass, so they are attracted to each other by gravitational forces.
Energy is released
, A molecule is formed
When a covalent bond is formed between two nitrogen atoms:
I. Energy is absorbed
II. Energy is released
III. A molecule is formed
IV. The nitrogen changes from the gaseous to the liquid state.
Weaker because neon has a smaller electron cloud, therefore there will be a smaller
separation of charge resulting in a weaker force.
The London dispersion force between two neon atoms compared to the London
dispersion force between two argon atoms where both systems are the most stable
is:
I. The same
II. Stronger
III. Weaker
Because:
IV. They are both noble gasses
V. Neon has a smaller electron cloud, therefore there will be a smaller separation
of charge resulting in a weaker force.
VI. Neon has a smaller electron cloud, therefore there will be a larger separation of
charge resulting in a stronger force.
Yes because it can be tested and answered though observations and experiments
Consider the question: Is there an attractive force between a pencil and the earth?
Is this a scientific question? [Yes or No]
Because
