Question 1

Who developed an empirical equation from which the wavelengths of lines in the spectrum of hydrogen atoms can be calculated?

Accepted Answer

A) Planck 
B) de Broglie 
C) Bohr 
D) Rutherford 
E) Rydberg

Question 2

Which word best describes the phenomenon which gives rise to a rainbow?

Accepted Answer

A) Reflection 
B) Dispersion 
C) Diffraction 
D) Interference 
E) Deflection

Question 3

Which of the following is a correct set of quantum numbers for an electron in a 3d orbital?

Accepted Answer

A) n = 3, l = 0, ml = −1 
B) n = 3, l = 1, ml = +3 
C) n = 3, l = 2, ml = 3 
D) n = 3, l = 3, ml = +2 
E) n = 3, l = 2, ml = −2

Question 4

Platinum, which is widely used as a catalyst, has a work functionΦ (the minimum energy needed to eject an electron from the metal surface) of 9.05 × 10−19 J. What is the longest wavelength of light which will cause electrons to be emitted?

Accepted Answer

A) 2.196 × 10 −7 m 
B) 4.553 × 10 −6 m 
C) 5.654 × 10 2 m 
D) 1.370 × 10 15 m 
E) > 10 6 m

Question 5

Continuous spectra are characteristic of molecules in the gas phase.

Accepted Answer

A) True 
 B)False

Question 6

In the quantum mechanical treatment of the hydrogen atom, which one of the following combinations of quantum numbers is not allowed?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) E

Question 7

What type of spectrum, if any, would be produced if the light radiated by a heated atomic gas were to be dispersed through a prism?

Accepted Answer

A) A continuous band of color 
B) A continuous band of color with some dark lines (missing wavelengths) 
C) Only blue light 
D) Only red light 
E) Discrete lines of different colors

Question 8

The orientation in space of an atomic orbital is associated with

Accepted Answer

A) the principal quantum number ( n). 
B) the angular momentum quantum number ( l). 
C) the magnetic quantum number ( ml). 
D) the spin quantum number ( ms). 
E) None of these choices are correct.

Question 9

Green light has a wavelength of 5200 Å. Calculate the energy of one photon of green light.

Accepted Answer

A) 3.4 × 10 −40 J 
B) 3.4 × 10 −30 J 
C) 3.8 × 10 −29 J 
D) 3.4 × 10 −27 J 
E) 3.8 × 10 −19 J

Question 10

Excited hydrogen atoms radiate energy in the

Accepted Answer

A) infrared region only. 
B) visible region only. 
C) ultraviolet region only. 
D) visible and ultraviolet regions only. 
E) infrared, visible, and ultraviolet regions.

Question 11

Interference of light waves

Accepted Answer

A) separates light into its component colors. 
B) creates a pattern of light and dark regions. 
C) focuses a broad beam of light into a point. 
D) bends light as it passes the edge of an object. 
E) creates a laser beam.

Question 12

The Rydberg equation is an example of an empirical equation.

Accepted Answer

A) True 
 B)False

Question 13

Consider the following adjectives used to describe types of spectrum: continuous, line, atomic, emission and absorption.How many of them are appropriate to describe the spectrum of radiation given off by a black body?

Accepted Answer

A) None 
B) One 
C) Two 
D) Three 
E) Four

Question 14

Continuous spectra are characteristic of heated solids.

Accepted Answer

A) True 
 B)False

Question 15

Which scientist first proposed that particles of matter could have wave properties?

Accepted Answer

A) Einstein 
B) Planck 
C) de Broglie 
D) Compton 
E) Heisenberg

Question 16

Who proposed a model that successfully explained the photoelectric effect?

Accepted Answer

A) Planck 
B) Einstein 
C) Compton 
D) Rydberg 
E) Bohr

Question 17

Which scientist demonstrated that photons transferred momentum during collisions with matter?

Accepted Answer

A) Bohr 
B) de Broglie 
C) Planck 
D) Compton 
E) Billiard

Question 18

Atomic orbitals developed using quantum mechanics

Accepted Answer

A) describe regions of space in which one is most likely to find an electron. 
B) describe exact paths for electron motion. 
C) give a description of the atomic structure which is essentially the same as the Bohr model. 
D) allow scientists to calculate an exact volume for the hydrogen atom. 
E) are in conflict with the Heisenberg Uncertainty Principle.

Question 19

The Rydberg equation, giving the wavelengths of lines in the spectrum of the hydrogen atom, was obtained by assuming that energy is quantized.

Accepted Answer

A) True 
 B)False

Question 20

In the quantum mechanical treatment of the hydrogen atom, the probability of finding an electron at any point is proportional to the wave function Ψ.

Accepted Answer

A) True 
 B)False

Exam 7: Quantum Theory and Atomic Structure

Who developed an empirical equation from which the wavelengths of lines in the spectrum of hydrogen atoms can be calculated?

Which word best describes the phenomenon which gives rise to a rainbow?

Which of the following is a correct set of quantum numbers for an electron in a 3d orbital?

Platinum, which is widely used as a catalyst, has a work functionΦ (the minimum energy needed to eject an electron from the metal surface) of 9.05 × 10⁻¹⁹ J. What is the longest wavelength of light which will cause electrons to be emitted?

Continuous spectra are characteristic of molecules in the gas phase.

In the quantum mechanical treatment of the hydrogen atom, which one of the following combinations of quantum numbers is not allowed?

What type of spectrum, if any, would be produced if the light radiated by a heated atomic gas were to be dispersed through a prism?

The orientation in space of an atomic orbital is associated with

Green light has a wavelength of 5200 Å. Calculate the energy of one photon of green light.

Excited hydrogen atoms radiate energy in the

Interference of light waves

The Rydberg equation is an example of an empirical equation.

Consider the following adjectives used to describe types of spectrum: continuous, line, atomic, emission and absorption.How many of them are appropriate to describe the spectrum of radiation given off by a black body?

Continuous spectra are characteristic of heated solids.

Which scientist first proposed that particles of matter could have wave properties?

Who proposed a model that successfully explained the photoelectric effect?

Which scientist demonstrated that photons transferred momentum during collisions with matter?

Atomic orbitals developed using quantum mechanics

The Rydberg equation, giving the wavelengths of lines in the spectrum of the hydrogen atom, was obtained by assuming that energy is quantized.

In the quantum mechanical treatment of the hydrogen atom, the probability of finding an electron at any point is proportional to the wave function Ψ.