AnswersFL-2003350-Chemistry 1 HonorsThe Modern Atomic Theory

The Modern Atomic Theory Answers

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1
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A change in which property of light will have no effect on whether or not the photoelectric effect occurs?

A
frequency
B
energy
C
intensity
D
wavelength
2
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The diagram shows Niels Bohr’s model of an atom. What happens when the electron moves from the first energy level to the second energy level?

Question illustration
A
Energy is absorbed, and an emission line is produced.
B
Energy is released, and an emission line is produced.
C
Energy is absorbed by the atom.
D
Energy is lost from the atom.
3

The emission spectrum of hydrogen shows discrete, bright, colored lines. Which characteristic of the Bohr model is best supported by this observation?

A
Energy is released when an electron moves to a higher energy level.
B
Smaller atoms have fewer spectral lines than larger atoms.
C
The energy of an electron increases with distance from the nucleus.
D
Electrons cannot exist in locations other than in specific orbits.
4

Which statement about Niels Bohr’s atomic model is true?

A
Higher orbits have lower energies.
B
Each orbit has a specific energy level.
C
Electrons can exist in any energy level.
D
Orbits close to the nucleus have no energy.
5

Light of a certain energy shines on a metal and causes electrons to be emitted. Based on the research of Albert Einstein, what change would most likely result in stopping the emission of electrons from this metal?

A
an increase in the intensity of the light
B
a decrease in the intensity of the light
C
the use of light that has a higher frequency
D
the use of light that has a lower frequency
6

How does the electron-cloud model describe electrons?

A
The exact position of an electron can be known.
B
An electron can be found at certain distances from the nucleus.
C
An electron has a high probability of being in certain regions.
D
Each electron follows a specific path around the nucleus.
7

Natalie observes these characteristics in the model of an atom.(i) includes positive charge(ii) contains electrons(iii) explains the photoelectric effect(iv) suggests the probable location of electronsWhich model is Natalie most likely examining?

A
Bohr model
B
Dalton’s model
C
plum pudding model
D
electron-cloud model
8

Which observation provided Albert Einstein the clue that he needed to explain the photoelectric effect?

A
Light is made up of extremely small particles.
B
Particles that are emitted from a strip of metal are electrons.
C
Shining light on a metal strip produces emissions.
D
Energy of electrons depends on light’s frequency, not intensity.
9

Which statement describes a major drawback of the Bohr model that caused scientists to replace it?

A
It worked only for helium and larger atoms.
B
It did not identify the distance between an electron and the nucleus.
C
It contradicted the Heisenberg uncertainty principle.
D
It stated that spectral lines of atoms are similar.
10

According to the Bohr model of an atom, what happens when an electron moves from the second energy level to the third energy level and then back to the second energy level?

A
Energy is absorbed and then stored in the atom.
B
Energy is released and then absorbed to form an absorption line.
C
Energy is absorbed and then released to form an emission line.
D
Energy is released from the atom, and the outer level is weakened.

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