Question 1

The energy of a photon is directly proportional to the wavelength of the radiation.

Accepted Answer

A) True 
 B)False  False

Question 2

According to the Rydberg equation, the line with the shortest wavelength in the emission spectrum of atomic hydrogen is predicted to lie at a wavelength (in nm) of

Accepted Answer

A) 91.2 nm. 
B) 1.10 × 10 −2 nm. 
C) 1.10 × 10 2 nm. 
D) 1.10 × 10 16 nm. 
E) None of these choices are correct. 
A) 91.2 nm. 
B) 1.10 × 10 −2 nm. 
C) 1.10 × 10 2 nm. 
D) 1.10 × 10 16 nm. 
E) None of these choices are correct. A

Question 3

Infrared radiation from the sun has a wavelength of 6200 nm. Calculate the energy of one photon of that radiation.

Accepted Answer

A) 4.l × 10 −39 J 
B) 4.l × 10 −30 J 
C) 3.2 × 10 −29 J 
D) 3.2 × 10 −26 J 
E) between 10 −20 and 10 −19 J 
A) 4.l × 10 −39 J 
B) 4.l × 10 −30 J 
C) 3.2 × 10 −29 J 
D) 3.2 × 10 −26 J 
E) between 10 −20 and 10 −19 J E

Question 4

In an atom, the square of an electron's wave function

Accepted Answer

A) becomes zero at the nucleus. 
B) is smallest near the nucleus. 
C) is largest near the nucleus. 
D) may be zero at more than one point. 
E) tends to infinity at large distances from the nucleus. 
A) becomes zero at the nucleus. 
B) is smallest near the nucleus. 
C) is largest near the nucleus. 
D) may be zero at more than one point. 
E) tends to infinity at large distances from the nucleus.

Question 5

In the quantum mechanical treatment of the hydrogen atom, the energy depends on the principal quantum number n but not on the values of l or ml.

Accepted Answer

A) True 
 B)False

Question 6

According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 × 103 m/s, the uncertainty in its position (in m) is at least

Accepted Answer

A) 1.7 × 10 −8 m. 
B) 6.6 × 10 −8 m. 
C) 17 m. 
D) 66 m. 
E) None of these choices are correct. 
A) 1.7 × 10 −8 m. 
B) 6.6 × 10 −8 m. 
C) 17 m. 
D) 66 m. 
E) None of these choices are correct.

Question 7

Line spectra are characteristic of atoms in the gas phase.

Accepted Answer

A) True 
 B)False

Question 8

A modern compact fluorescent lamp contains 1.4 mg of mercury. If each mercury atom in the lamp were to emit a single photon of wavelength 254 nm, how many joules of energy would be emitted?

Accepted Answer

A) 7.8 × 10 −19 J 
B) 3.3 J 
C) 6.6 × 10 2 J 
D) 3.3 × 10 3 J 
E) 4.2 × 10 18 J 
A) 7.8 × 10 −19 J 
B) 3.3 J 
C) 6.6 × 10 2 J 
D) 3.3 × 10 3 J 
E) 4.2 × 10 18 J

Question 9

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 absorbed by a sample of mercury vapor?

Accepted Answer

A) One 
B) Two 
C) Three 
D) Four 
E) Five 
A) One 
B) Two 
C) Three 
D) Four 
E) Five

Question 10

An electron in the n = 6 level emits a photon with a wavelength of 410.2 nm. To what energy level does the electron move?

Accepted Answer

A) n = 1 
B) n = 2 
C) n = 3 
D) n = 4 
E) n = 5 
A) n = 1 
B) n = 2 
C) n = 3 
D) n = 4 
E) n = 5

Question 11

A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?

Accepted Answer

A) 7.29 × 10 −37 m 
B) 3.26 × 10 −37 m 
C) 5.08 × 10 −30 m 
D) 1.34 × 10 −30 m 
E) None of these choices are correct. 
A) 7.29 × 10 −37 m 
B) 3.26 × 10 −37 m 
C) 5.08 × 10 −30 m 
D) 1.34 × 10 −30 m 
E) None of these choices are correct.

Question 12

As the frequency of electromagnetic radiation increases, its wavelength also increases.

Accepted Answer

A) True 
 B)False

Question 13

The FM station KDUL broadcasts music at 99.1 MHz. Find the wavelength of these waves.

Accepted Answer

A) 1.88 × 10 −2 m 
B) 0.330 m 
C) 3.03 m 
D) 5.33 × 10 2 m 
E) > 10 3 m 
A) 1.88 × 10 −2 m 
B) 0.330 m 
C) 3.03 m 
D) 5.33 × 10 2 m 
E) > 10 3 m

Question 14

Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy.

Accepted Answer

A) radio, infrared, ultraviolet, gamma rays 
B) radio, ultraviolet, infrared, gamma rays 
C) gamma rays, infrared, radio, ultraviolet 
D) gamma rays, ultraviolet, infrared, radio 
E) infrared, ultraviolet, radio, gamma rays 
A) radio, infrared, ultraviolet, gamma rays 
B) radio, ultraviolet, infrared, gamma rays 
C) gamma rays, infrared, radio, ultraviolet 
D) gamma rays, ultraviolet, infrared, radio 
E) infrared, ultraviolet, radio, gamma rays

Question 15

Which of the following frequencies of electromagnetic radiation has the shortest wavelength?

Accepted Answer

A) 1 kilohertz 
B) 1 terahertz 
C) 1 dekahertz 
D) 1 gigahertz 
E) 1 megahertz 
A) 1 kilohertz 
B) 1 terahertz 
C) 1 dekahertz 
D) 1 gigahertz 
E) 1 megahertz

Question 16

According to the Bohr theory of the hydrogen atom, the minimum energy (in J) needed to ionize a hydrogen atom from the n = 2 state is

Accepted Answer

A) 2.18 × 10 −18 J. 
B) 1.64 × 10 −18 J. 
C) 5.45 × 10 −19 J. 
D) 3.03 × 10 −19 J. 
E) None of these choices are correct. 
A) 2.18 × 10 −18 J. 
B) 1.64 × 10 −18 J. 
C) 5.45 × 10 −19 J. 
D) 3.03 × 10 −19 J. 
E) None of these choices are correct.

Question 17

The size 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) the angular momentum and magnetic quantum numbers, together. 
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) the angular momentum and magnetic quantum numbers, together.

Question 18

Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy.

Accepted Answer

A) radio, visible, infrared, ultraviolet 
B) infrared, visible, ultraviolet, microwave 
C) visible, ultraviolet, infrared, gamma rays 
D) X-radiation, visible, infrared, microwave 
E) microwave, infrared, visible, ultraviolet 
A) radio, visible, infrared, ultraviolet 
B) infrared, visible, ultraviolet, microwave 
C) visible, ultraviolet, infrared, gamma rays 
D) X-radiation, visible, infrared, microwave 
E) microwave, infrared, visible, ultraviolet

Question 19

In the photoelectric effect, a photon with an energy of 5.3 × 10−19 J strikes an electron in a metal. Of this energy, 3.6 × 10−19 J is the minimum energy required for the electron to escape from the metal. The remaining energy appears as kinetic energy of the photoelectron. What is the velocity of the photoelectron, assuming it was initially at rest?

Accepted Answer

A) 3.7 × 10 14 m/s 
B) 3.7 × 10 11 m/s 
C) 1.9 × 10 6 m/s 
D) 6.1 × 10 5 m/s 
E) 1.7 × 10 −19 m/s 
A) 3.7 × 10 14 m/s 
B) 3.7 × 10 11 m/s 
C) 1.9 × 10 6 m/s 
D) 6.1 × 10 5 m/s 
E) 1.7 × 10 −19 m/s

Question 20

A photon has an energy of 5.53 × 10−17 J. What is its frequency in s−1 ?

Accepted Answer

A) 3.66 × 10 −50 s −1 
B) 1.20 × 10 −17 s −1 
C) 3.59 × 10 −9 s −1 
D) 2.78 × 10 8 s −1 
E) 8.35 × 10 16 s −1 
A) 3.66 × 10 −50 s −1 
B) 1.20 × 10 −17 s −1 
C) 3.59 × 10 −9 s −1 
D) 2.78 × 10 8 s −1 
E) 8.35 × 10 16 s −1

Exam 7: Quantum Theory and Atomic Structure

The energy of a photon is directly proportional to the wavelength of the radiation.

According to the Rydberg equation, the line with the shortest wavelength in the emission spectrum of atomic hydrogen is predicted to lie at a wavelength (in nm) of

Infrared radiation from the sun has a wavelength of 6200 nm. Calculate the energy of one photon of that radiation.

In an atom, the square of an electron's wave function

In the quantum mechanical treatment of the hydrogen atom, the energy depends on the principal quantum number n but not on the values of l or ml.

According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 × 103 m/s, the uncertainty in its position (in m) is at least

Line spectra are characteristic of atoms in the gas phase.

A modern compact fluorescent lamp contains 1.4 mg of mercury. If each mercury atom in the lamp were to emit a single photon of wavelength 254 nm, how many joules of energy would be emitted?

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 absorbed by a sample of mercury vapor?

An electron in the n = 6 level emits a photon with a wavelength of 410.2 nm. To what energy level does the electron move?

A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?

As the frequency of electromagnetic radiation increases, its wavelength also increases.

The FM station KDUL broadcasts music at 99.1 MHz. Find the wavelength of these waves.

Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy.

Which of the following frequencies of electromagnetic radiation has the shortest wavelength?

According to the Bohr theory of the hydrogen atom, the minimum energy (in J) needed to ionize a hydrogen atom from the n = 2 state is

The size of an atomic orbital is associated with

Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy.

A photon has an energy of 5.53 × 10−17 J. What is its frequency in s−1 ?

Keys to the Study of Chemistry: Definitions, Units, and Problem Solving

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and Reaction Direction

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

In the quantum mechanical treatment of the hydrogen atom, the energy depends on the principal quantum number n but not on the values of l or m_l_.

According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 × 10³ m/s, the uncertainty in its position (in m) is at least

A photon has an energy of 5.53 × 10⁻¹⁷ J. What is its frequency in s⁻¹ ?