MSU CEM 141 Final Question and Answer
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• Atoms are mostly empty space
Atoms are in constant motion -✓✓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. -✓✓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.
• All of the above -✓✓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. -✓✓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 -✓✓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 -✓✓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
| 100% Correct Answers | Exam Review
Pack
• Atoms are mostly empty space
Atoms are in constant motion -✓✓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. -✓✓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.
• All of the above -✓✓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. -✓✓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 -✓✓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 -✓✓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
