CEM 141 MSU Final Exam |35
Questions and answers
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
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 - -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 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.
Questions and answers
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
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 - -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 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.
