CEM 141 MSU Final Exam Questions and
Answers (Solved Papers)
Yes because it can be tested and answered though
observations and experiments - Correct 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.
Atoms are mostly empty space
Atoms are in constant motion - Correct Answers ✅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 Answers ✅Electrons
,CEM 141 MSU Final Exam Questions and
Answers (Solved Papers)
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.
All of the above - Correct Answers ✅Which of the following
contain(s) atoms?
a. Heat
b. Light
c. Energy
d. Dust
e. All of the above
, CEM 141 MSU Final Exam Questions and
Answers (Solved Papers)
III because the alpha particles go straight through the atom
because it is mostly empty space. - Correct Answers ✅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
Answers ✅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
Answers ✅How would the strength of the electrostatic force
change if the distance between the two charged objects
decreased?
Answers (Solved Papers)
Yes because it can be tested and answered though
observations and experiments - Correct 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.
Atoms are mostly empty space
Atoms are in constant motion - Correct Answers ✅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 Answers ✅Electrons
,CEM 141 MSU Final Exam Questions and
Answers (Solved Papers)
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.
All of the above - Correct Answers ✅Which of the following
contain(s) atoms?
a. Heat
b. Light
c. Energy
d. Dust
e. All of the above
, CEM 141 MSU Final Exam Questions and
Answers (Solved Papers)
III because the alpha particles go straight through the atom
because it is mostly empty space. - Correct Answers ✅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
Answers ✅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
Answers ✅How would the strength of the electrostatic force
change if the distance between the two charged objects
decreased?
