Question 1

According to the Rydberg equation, the longest wavelength (in nm) in the series of H-atom lines with n1 = 3 is

Accepted Answer

A) 1875 nm. 
B) 1458 nm. 
C) 820. nm. 
D) 656 nm. 
E) 365 nm. 
A) 1875 nm. 
B) 1458 nm. 
C) 820. nm. 
D) 656 nm. 
E) 365 nm.

Question 2

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

Accepted Answer

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

Question 3

For potassium metal, the work functionΦ (the minimum energy needed to eject an electron from the metal surface) is 3.68 × 10−19 J. Which is the longest wavelength of the following which could excite photoelectrons?

Accepted Answer

A) 550 nm 
B) 500 nm 
C) 450 nm 
D) 400 nm 
E) 350 nm 
A) 550 nm 
B) 500 nm 
C) 450 nm 
D) 400 nm 
E) 350 nm

Question 4

Which of the following is a correct set of quantum numbers for an electron in a 5f orbital?

Accepted Answer

A) n = 5, l = 3, ml = +1 
B) n = 5, l = 2, ml = +3 
C) n = 4, l = 3, ml = 0 
D) n = 4, l = 2, ml = +1 
E) n = 5, l = 4, ml = 3 
A) n = 5, l = 3, ml = +1 
B) n = 5, l = 2, ml = +3 
C) n = 4, l = 3, ml = 0 
D) n = 4, l = 2, ml = +1 
E) n = 5, l = 4, ml = 3

Question 5

Use the Rydberg equation to calculate the frequency of a photon absorbed when the hydrogen atom undergoes a transition from n1 = 2 to n2 = 4. (R = 1.096776 × 107 m−1)

Accepted Answer

A) 2.056 × 10 6 s −1 
B) 2.742 × 10 6 s −1 
C) 6.165 × 10 14 s −1 
D) 8.226 × 10 14 s −1 
E) > 10 15 s −1 
A) 2.056 × 10 6 s −1 
B) 2.742 × 10 6 s −1 
C) 6.165 × 10 14 s −1 
D) 8.226 × 10 14 s −1 
E) > 10 15 s −1

Question 6

Line spectra from all regions of the electromagnetic spectrum, including the Paschen series of infrared lines for hydrogen, are used by astronomers to identify elements present in the atmospheres of stars. Calculate the wavelength of the photon emitted when the hydrogen atom undergoes a transition from n = 5 to n = 3. (R = 1.096776 × 107 m−1)

Accepted Answer

A) 205.1 nm 
B) 384.6 nm 
C) 683.8 nm 
D) 1282 nm 
E) > 1500 nm 
A) 205.1 nm 
B) 384.6 nm 
C) 683.8 nm 
D) 1282 nm 
E) > 1500 nm

Question 7

Who was the first scientist to propose that an object could emit only certain amounts of energy?

Accepted Answer

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

Question 8

Electromagnetic radiation can be specified by its wavelength (λ), its frequency (υ) or its period (τ). The period τ is the time it takes one complete wavelength to pass a point in space. Based on this information, what is the mathematical relationship between υ and τ?

Accepted Answer

A) υ = 1/τ 
B) υ= τ 
C) τ = υ/ с 
D) с = τ × υ 
E) τ = с/υ 
A) υ = 1/τ 
B) υ= τ 
C) τ = υ/ с 
D) с = τ × υ 
E) τ = с/υ

Question 9

Which scientist first proposed that the electron in the hydrogen atom can have only certain energies?

Accepted Answer

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

Question 10

A wave function for an electron is called an atomic orbital.

Accepted Answer

A) True 
 B)False

Question 11

The energy of an electron in the hydrogen atom is determined by

Accepted Answer

A) the principal quantum number ( n)only. 
B) the angular momentum quantum number ( l)only. 
C) the principal and angular momentum quantum numbers ( n & l ). 
D) the principal and magnetic quantum numbers ( n & ml). 
E) the principal, angular momentum and magnetic quantum numbers. 
A) the principal quantum number ( n)only. 
B) the angular momentum quantum number ( l)only. 
C) the principal and angular momentum quantum numbers ( n & l ). 
D) the principal and magnetic quantum numbers ( n & ml). 
E) the principal, angular momentum and magnetic quantum numbers.

Question 12

The ionization energy is the energy needed to remove an electron from an atom. In the Bohr model of the hydrogen atom, this means exciting the electron to the n = ∞ state. What is the ionization energy in kJ/mol, for hydrogen atoms initially in the n = 2 energy level?

Accepted Answer

A) 290 kJ/mol 
B) 328 kJ/mol 
C) 656 kJ/mol 
D) 983 kJ/mol 
E) 1311 kJ/mol 
A) 290 kJ/mol 
B) 328 kJ/mol 
C) 656 kJ/mol 
D) 983 kJ/mol 
E) 1311 kJ/mol

Question 13

The Bohr theory of the hydrogen atom predicts the energy difference (in J) between the n = 3 and the n = 5 state to be

Accepted Answer

A) 8.72 × 10 −20 J. 
B) 1.36 × 10 −19 J. 
C) 2.42 × 10 −19 J. 
D) 1.55 × 10 −19 J. 
E) 1.09 × 10 −18 J. 
A) 8.72 × 10 −20 J. 
B) 1.36 × 10 −19 J. 
C) 2.42 × 10 −19 J. 
D) 1.55 × 10 −19 J. 
E) 1.09 × 10 −18 J.

Question 14

In the Rydberg equation, for a fixed value of n1, the longest wavelength line has n2 = ∞.

Accepted Answer

A) True 
 B)False

Question 15

The interference pattern seen when light passes through narrow, closely spaced slits, is due to

Accepted Answer

A) diffraction. 
B) reflection. 
C) refraction. 
D) dispersion. 
E) deflection. 
A) diffraction. 
B) reflection. 
C) refraction. 
D) dispersion. 
E) deflection.

Question 16

In the Bohr model of the hydrogen atom, the electron moves in a circular path which Bohr referred to as an orbital.

Accepted Answer

A) True 
 B)False

Question 17

The de Broglie equation predicts that the wavelength (in m) of a proton moving at 1000. m/s is

Accepted Answer

A) 3.96 × 10 −10 m. 
B) 3.96 × 10 −7 m. 
C) 2.52 × 10 6 m. 
D) 2.52 × 10 9 m. 
E) > 10 10 m. 
A) 3.96 × 10 −10 m. 
B) 3.96 × 10 −7 m. 
C) 2.52 × 10 6 m. 
D) 2.52 × 10 9 m. 
E) > 10 10 m.

Question 18

Who proposed the principle that states that one cannot simultaneously know the exact position and velocity of a particle?

Accepted Answer

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

Question 19

Contact lenses can focus light due to the __________ of the waves.

Accepted Answer

A) diffraction 
B) reflection 
C) refraction 
D) dispersion 
E) interference 
A) diffraction 
B) reflection 
C) refraction 
D) dispersion 
E) interference

Question 20

If the energy of a photon is 1.32 × 10−18 J, what is its wavelength in nm?

Accepted Answer

A) 1.50 × 10 −7 nm 
B) 150 nm 
C) 1.99 × 10 15 nm 
D) 1.99 × 10 24 nm 
E) None of these choices are correct. 
A) 1.50 × 10 −7 nm 
B) 150 nm 
C) 1.99 × 10 15 nm 
D) 1.99 × 10 24 nm 
E) None of these choices are correct.

Exam 7: Quantum Theory and Atomic Structure

According to the Rydberg equation, the longest wavelength (in nm) in the series of H-atom lines with n1 = 3 is

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

For potassium metal, the work functionΦ (the minimum energy needed to eject an electron from the metal surface) is 3.68 × 10−19 J. Which is the longest wavelength of the following which could excite photoelectrons?

Which of the following is a correct set of quantum numbers for an electron in a 5f orbital?

Use the Rydberg equation to calculate the frequency of a photon absorbed when the hydrogen atom undergoes a transition from n1 = 2 to n2 = 4. (R = 1.096776 × 107 m−1)

Who was the first scientist to propose that an object could emit only certain amounts of energy?

Electromagnetic radiation can be specified by its wavelength (λ), its frequency (υ) or its period (τ). The period τ is the time it takes one complete wavelength to pass a point in space. Based on this information, what is the mathematical relationship between υ and τ?

Which scientist first proposed that the electron in the hydrogen atom can have only certain energies?

A wave function for an electron is called an atomic orbital.

The energy of an electron in the hydrogen atom is determined by

The ionization energy is the energy needed to remove an electron from an atom. In the Bohr model of the hydrogen atom, this means exciting the electron to the n = ∞ state. What is the ionization energy in kJ/mol, for hydrogen atoms initially in the n = 2 energy level?

The Bohr theory of the hydrogen atom predicts the energy difference (in J) between the n = 3 and the n = 5 state to be

In the Rydberg equation, for a fixed value of n1, the longest wavelength line has n2 = ∞.

The interference pattern seen when light passes through narrow, closely spaced slits, is due to

In the Bohr model of the hydrogen atom, the electron moves in a circular path which Bohr referred to as an orbital.

The de Broglie equation predicts that the wavelength (in m) of a proton moving at 1000. m/s is

Who proposed the principle that states that one cannot simultaneously know the exact position and velocity of a particle?

Contact lenses can focus light due to the __________ of the waves.

If the energy of a photon is 1.32 × 10−18 J, what is its wavelength in nm?

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

According to the Rydberg equation, the longest wavelength (in nm) in the series of H-atom lines with n₁ = 3 is

For potassium metal, the work functionΦ (the minimum energy needed to eject an electron from the metal surface) is 3.68 × 10⁻¹⁹ J. Which is the longest wavelength of the following which could excite photoelectrons?

Use the Rydberg equation to calculate the frequency of a photon absorbed when the hydrogen atom undergoes a transition from n₁ = 2 to n₂ = 4. (R = 1.096776 × 10⁷ m⁻¹)

In the Rydberg equation, for a fixed value of n₁, the longest wavelength line has n₂ = ∞.

If the energy of a photon is 1.32 × 10⁻¹⁸J, what is its wavelength in nm?