Question 1

The Rydberg equation is an example of an empirical equation.

Accepted Answer

A) True 
 B)False  True

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

Question 3

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

Accepted Answer

A) 3.4 $\times$ 10-40 J 
B) 3.4 $\times$ 10-30 J 
C) 3.8 $\times$ 10-29 J 
D) 3.4 $\times$ 10-27 J 
E) 3.8 $\times$ 10-19 J 
A) 3.4 $\times$ 10-40 J 
B) 3.4 $\times$ 10-30 J 
C) 3.8 $\times$ 10-29 J 
D) 3.4 $\times$ 10-27 J 
E) 3.8 $\times$ 10-19 J E

Question 4

Continuous spectra are characteristic of molecules in the gas phase.

Accepted Answer

A) True 
 B)False

Question 5

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 6

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 $\times$ 10-37 m 
B) 3.26 $\times$ 10-37 m 
C) 5.08 $\times$ 10-30 m 
D) 1.34 $\times$ 10-30 m 
E) None of these choices is correct. 
A) 7.29 $\times$ 10-37 m 
B) 3.26 $\times$ 10-37 m 
C) 5.08 $\times$ 10-30 m 
D) 1.34 $\times$ 10-30 m 
E) None of these choices is correct.

Question 7

Who proposed a model that successfully explained the photoelectric effect?

Accepted Answer

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

Question 8

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 
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 9

For potassium metal,the work function $\phi$ (the minimum energy needed to eject an electron from the metal surface)is 3.68 $\times$ 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 10

In the Rydberg equation,for a fixed value of n1,the longest wavelength line has n2 = $\infty$

Accepted Answer

A) True 
 B)False

Question 11

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 is correct. 
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 is correct.

Question 12

Who proposed the principle which 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 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 $\times$ 10-20 J 
B) 1.36 $\times$ 10-19 J 
C) 2.42 $\times$ 10-19 J 
D) 1.55 $\times$ 10-19 J 
E) 1.09 $\times$ 10-18 J 
A) 8.72 $\times$ 10-20 J 
B) 1.36 $\times$ 10-19 J 
C) 2.42 $\times$ 10-19 J 
D) 1.55 $\times$ 10-19 J 
E) 1.09 $\times$ 10-18 J

Question 14

Which one of the following sets of quantum numbers can correctly represent a 3p orbital?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e

Question 15

a.Calculate the momentum of a photon of green light,wavelength 515 nm.
b.If this photon is traveling in a vacuum,what is its "mass"?

Accepted Answer

a.1.29 @#LAT-DLM& 10^-27</

Question 16

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 
A) a 
B) b 
C) c 
D) d 
E) e

Question 17

In the quantum mechanical treatment of the hydrogen atom,the functions $\varPsi$ and $\varPsi$2 both feature prominently.Briefly explain (in principle)how they are obtained and what,if anything,their physical meanings are.

Accepted Answer

The wave function,@#LAT-DLM&,is a solution to the

Question 18

In not more than three lines for each answer,briefly outline one important scientific contribution of each of the following.
a.Planck
b.de Broglie
c.Heisenberg

Accepted Answer

a.Planck is responsible for first propos

Question 19

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. 
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 20

For the following equations,
a.name the scientist to whom the equation is attributed.
b.in not more than three lines,explain clearly what the equation means or represents.

Accepted Answer

1)a.Planck
b.A black body can only emit

Exam 7: Quantum Theory and Atomic Structure

The Rydberg equation is an example of an empirical equation.

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

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

Continuous spectra are characteristic of molecules in the gas phase.

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

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?

Who proposed a model that successfully explained the photoelectric effect?

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

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

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

The orientation in space of an atomic orbital is associated with

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

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

Which one of the following sets of quantum numbers can correctly represent a 3p orbital?

a.Calculate the momentum of a photon of green light,wavelength 515 nm. b.If this photon is traveling in a vacuum,what is its "mass"?

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

In the quantum mechanical treatment of the hydrogen atom,the functions Ψ\varPsiΨ and Ψ\varPsiΨ 2 both feature prominently.Briefly explain (in principle)how they are obtained and what,if anything,their physical meanings are.

In not more than three lines for each answer,briefly outline one important scientific contribution of each of the following. a.Planck b.de Broglie c.Heisenberg

Atomic orbitals developed using quantum mechanics

For the following equations, a.name the scientist to whom the equation is attributed. b.in not more than three lines,explain clearly what the equation means or represents.

Keys to the Study of Chemistry

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 Solutions

The Main-Group Elements: Applying Principles of Bonding and Structure

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 the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

For potassium metal,the work function $\phi$ (the minimum energy needed to eject an electron from the metal surface)is 3.68 $\times$ 10^-19 J.Which is the longest wavelength of the following which could excite photoelectrons?

In the Rydberg equation,for a fixed value of n₁,the longest wavelength line has n₂ = $\infty$

In the quantum mechanical treatment of the hydrogen atom,the functions $\varPsi$ and $\varPsi$ ² both feature prominently.Briefly explain (in principle)how they are obtained and what,if anything,their physical meanings are.