Pretest

Question 1

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

Revolt · Accepted Answer

B: Energy of electrons depends on light’s frequency, not intensity.

Question 2

Which is a correct comparison between the modern quantum model and John Dalton’s model of the atom?

Revolt · Accepted Answer

C: The modern model recognizes particles in the atom, whereas Dalton’s model does not.

Question 3

The Bohr model of the atom explained why emission spectra are discrete. It could also be used to explain the photoelectric effect. Which is a correct explanation of the photoelectric effect according to the model?

Revolt · Accepted Answer

D: Electrons need specific amounts of energy to jump levels and be emitted.

Question 4

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

Revolt · Accepted Answer

D: Electrons cannot exist in locations other than in specific orbits.

Question 5

Which atomic model states that it is impossible to know the exact location of electrons around the nucleus?

Revolt · Accepted Answer

D: electron-cloud model

Question 6

This flow chart shows the amount of energy that is emitted by each type of light. Open image in full-screen view In an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect?

Revolt · Accepted Answer

A: ultraviolet light

Question 7

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?

Revolt · Accepted Answer

C: Energy is absorbed and then released to form an emission line.

Question 8

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 electrons Which model is Natalie most likely examining?

Revolt · Accepted Answer

A: electron-cloud model

Question 9

Which equation was used by Albert Einstein to explain the photoelectric effect? [ cap e is equal to energy, h is equal to Planck’s constant, and v is equal to frequency.]

Revolt · Accepted Answer

C: cap e is equal to h v

Question 10

Which statement about the electron-cloud model is true?

Revolt · Accepted Answer

B: It is the currently accepted atomic model.

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