CEM 141
CEM 141 MSU Final Exam Study Questions and
Answers Graded A+ 2026
Yes because it can be tested and answered though observations and experiments -
Correct Answer ✔-Consider the question: Is there an attractive force between a
pencil and the earth?
Is this a scientific question? [Yes or No]
Because
III. It can be tested and answered through observations and experiments
IV. The answer is already known and we find it online
V. There is no way to design an experiment to answer this question.
Atoms are mostly empty space
Atoms are in constant motion -Correct Answer ✔-Which of the following
properties ascribed to atoms by the Greeks do we still consider valid?
I. Atoms are mostly empty space
II. The size and shape of the atoms determine a material's properties
III. Atoms are indivisible
IV. Atoms are in constant motion
The cathode ray tube experiment
The beam of particles emitted from the cathode bent toward the positively
charged plate. -Correct Answer ✔-Electrons are negatively charged. Which
experiment provided evidence to support this claim? What is the specific evidence
used to support this claim?
Experiment:
I. The gold foil experiment
II. The cathode ray tube experiment
Evidence:
III. Most of the positively charged alpha particles shot at a thin gold foil passed
straight through.
IV. A small fraction of the positively charged alpha particles shot at a thin gold foil
were deflected.
CEM 141
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V. The beam of particles emitted from the cathode bent toward the positively
charged plate.
VI. The beam of particles emitted from the cathode behaved the same no matter
what type of metal the cathode was made of.
All of the above -Correct Answer ✔-Which of the following contain(s) atoms?
a. Heat
b. Light
c. Energy
d. Dust
e. All of the above
III because the alpha particles go straight through the atom because it is mostly
empty space. -Correct Answer ✔-The diagram below shows alpha particles being
fired at a piece of gold foil. Where will the majority of the alpha particles be
detected (point I, II, or III) and why?
IV. Alpha particles bounce off the nuclei within the gold atoms because the nuclei
are much more massive than the alpha particles.
V. The alpha particles are repelled when they come close to the nuclei because
both are charged.
VI. The alpha particles go straight through the atom because it is mostly empty
space.
All atoms are indivisible and indestructable -Correct Answer ✔-Thomson's
cathode ray tube experiment proved FALSE what part of Dalton's atomic theory?
a. All atoms are indivisible and indestructible
b. All atoms of a given element are identical
c. All matter is made of atoms.
d. Compounds are formed from the combination of two or more elements.
e. Chemical reactions are rearranging of atoms
The electrostatic force would become stronger -Correct Answer ✔-How would the
strength of the electrostatic force change if the distance between the two charged
objects decreased?
CEM 141
CEM 141 MSU Final Exam Study Questions and
Answers Graded A+ 2026
Yes because it can be tested and answered though observations and experiments -
Correct Answer ✔-Consider the question: Is there an attractive force between a
pencil and the earth?
Is this a scientific question? [Yes or No]
Because
III. It can be tested and answered through observations and experiments
IV. The answer is already known and we find it online
V. There is no way to design an experiment to answer this question.
Atoms are mostly empty space
Atoms are in constant motion -Correct Answer ✔-Which of the following
properties ascribed to atoms by the Greeks do we still consider valid?
I. Atoms are mostly empty space
II. The size and shape of the atoms determine a material's properties
III. Atoms are indivisible
IV. Atoms are in constant motion
The cathode ray tube experiment
The beam of particles emitted from the cathode bent toward the positively
charged plate. -Correct Answer ✔-Electrons are negatively charged. Which
experiment provided evidence to support this claim? What is the specific evidence
used to support this claim?
Experiment:
I. The gold foil experiment
II. The cathode ray tube experiment
Evidence:
III. Most of the positively charged alpha particles shot at a thin gold foil passed
straight through.
IV. A small fraction of the positively charged alpha particles shot at a thin gold foil
were deflected.
CEM 141
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V. The beam of particles emitted from the cathode bent toward the positively
charged plate.
VI. The beam of particles emitted from the cathode behaved the same no matter
what type of metal the cathode was made of.
All of the above -Correct Answer ✔-Which of the following contain(s) atoms?
a. Heat
b. Light
c. Energy
d. Dust
e. All of the above
III because the alpha particles go straight through the atom because it is mostly
empty space. -Correct Answer ✔-The diagram below shows alpha particles being
fired at a piece of gold foil. Where will the majority of the alpha particles be
detected (point I, II, or III) and why?
IV. Alpha particles bounce off the nuclei within the gold atoms because the nuclei
are much more massive than the alpha particles.
V. The alpha particles are repelled when they come close to the nuclei because
both are charged.
VI. The alpha particles go straight through the atom because it is mostly empty
space.
All atoms are indivisible and indestructable -Correct Answer ✔-Thomson's
cathode ray tube experiment proved FALSE what part of Dalton's atomic theory?
a. All atoms are indivisible and indestructible
b. All atoms of a given element are identical
c. All matter is made of atoms.
d. Compounds are formed from the combination of two or more elements.
e. Chemical reactions are rearranging of atoms
The electrostatic force would become stronger -Correct Answer ✔-How would the
strength of the electrostatic force change if the distance between the two charged
objects decreased?
CEM 141
