CEM 141 MSU Final Exam Questions with
Detailed Verified Answers
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. Ans: Yes because
it can be tested and answered though observations and experiments
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 Ans: Atoms are mostly empty space
Atoms are in constant motion
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.
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. Ans: The cathode ray tube experiment
The beam of particles emitted from the cathode bent toward the positively charged
plate.
Which of the following contain(s) atoms?
a. Heat
b. Light
c. Energy
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, d. Dust
e. All of the above Ans: All of the above
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.
Ans: III because the alpha particles go straight through the atom because it is mostly
empty space.
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 Ans: All atoms are indivisible and
indestructable
© Get it right 2025 Getaway - Stuvia US All rights reserved
Detailed Verified Answers
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. Ans: Yes because
it can be tested and answered though observations and experiments
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 Ans: Atoms are mostly empty space
Atoms are in constant motion
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.
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. Ans: The cathode ray tube experiment
The beam of particles emitted from the cathode bent toward the positively charged
plate.
Which of the following contain(s) atoms?
a. Heat
b. Light
c. Energy
© Get it right 2025 Getaway - Stuvia US All rights reserved
, d. Dust
e. All of the above Ans: All of the above
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.
Ans: III because the alpha particles go straight through the atom because it is mostly
empty space.
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 Ans: All atoms are indivisible and
indestructable
© Get it right 2025 Getaway - Stuvia US All rights reserved
