Question 1

Which of the following combinations of quantum numbers is permissible?

Accepted Answer

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

Question 2

A laser emits photons having an energy of 3.74 × 10-19 J.What color would be expected for the light emitted by this laser? (c = 3.00 × 108 m/s,h = 6.63 × 10-34 J ⋅ s)

Accepted Answer

A) yellow to orange 
B) orange to red 
C) green 
D) violet 
E) blue 
A) yellow to orange 
B) orange to red 
C) green 
D) violet 
E) blue

Question 3

​What is the frequency of photons that have molar energy of 339.00 kJ/mol?
(c​ = 3.00 × 108 m/s,h ​= 6.63 × 10-34 J·s,​NA = 6.02 × 1023 mol-1)

Accepted Answer

A) ​5.63×10-19 Hz 
B) ​8.49×1014 Hz 
C) ​1.69×10-10 Hz 
D) ​5.87×10-31 Hz 
E) ​2.83×106 Hz 
A) ​5.63×10-19 Hz 
B) ​8.49×1014 Hz 
C) ​1.69×10-10 Hz 
D) ​5.87×10-31 Hz 
E) ​2.83×106 Hz

Question 4

What is the value of the angular momentum quantum number for an electron in a 1s orbital?

Accepted Answer

A) 2 
B) 4 
C) 3 
D) 0 
E) 1 
A) 2 
B) 4 
C) 3 
D) 0 
E) 1

Question 5

If the location of a particular electron can be measured only to a precision of​ 0.069 nm,what is the minimum uncertainty in the electron's velocity?
(me=9.109×10-31 kg,c=3.00×108 m/s,h=6.63×10-34 J·s)

Accepted Answer

A) ​8.4×105 m/s 
B) ​​2.2×105 m/s 
C) ​​8.4×10-4 m/s 
D) 1​​×10-6 m/s 
E) ​​1.7×10-13 m/s 
A) ​8.4×105 m/s 
B) ​​2.2×105 m/s 
C) ​​8.4×10-4 m/s 
D) 1​​×10-6 m/s 
E) ​​1.7×10-13 m/s

Question 6

Which quantum number distinguishes the different shapes of the orbitals?

Accepted Answer

A) n 
B) ml 
C) l 
D) ms 
E) any of these 
A) n 
B) ml 
C) l 
D) ms 
E) any of these

Question 7

The wavelength of a gamma ray is 4 × 10-11 m.Calculate the frequency of the ray.

Accepted Answer

A) ​32 × 1017/s 
B) ​75 × 1017/s 
C) ​5 × 1019/s 
D) ​12 × 1017/s 
E) ​28 × 1019/s 
A) ​32 × 1017/s 
B) ​75 × 1017/s 
C) ​5 × 1019/s 
D) ​12 × 1017/s 
E) ​28 × 1019/s

Question 8

Which hydrogen atom orbital has an energy essentially identical to a 3d orbital?

Accepted Answer

A) 5d 
B) 4d 
C) 2s 
D) 1s 
E) 3p 
A) 5d 
B) 4d 
C) 2s 
D) 1s 
E) 3p

Question 9

Which of the following scientists first postulated that the sharp lines in the emission spectra of elements were caused by electrons going from high-energy levels to low-energy levels?

Accepted Answer

A) Rutherford 
B) Pauli 
C) Hund 
D) de Broglie 
E) Bohr 
A) Rutherford 
B) Pauli 
C) Hund 
D) de Broglie 
E) Bohr

Question 10

The number of orbitals in a p subshell is

Accepted Answer

A) 3. 
B) 1. 
C) 7. 
D) 2. 
E) 5. 
A) 3. 
B) 1. 
C) 7. 
D) 2. 
E) 5.

Question 11

What is the wavelength of photons that have molar energy of 515 kJ/mol? (c = 3.00 × 108 m/s,h = 6.63 × 10-34 J · s,NA = 6.02 × 1023 mol-1)​​

Accepted Answer

A) ​1.29 × 106 nm 
B) ​8.55 × 10-10 nm 
C) ​233 nm 
D) ​3.86 × 10-22 nm 
E) ​2.33 × 105 nm 
A) ​1.29 × 106 nm 
B) ​8.55 × 10-10 nm 
C) ​233 nm 
D) ​3.86 × 10-22 nm 
E) ​2.33 × 105 nm

Question 12

A radial probability plot for an electron in an atom,like that shown below,

Accepted Answer

A) specifies the probable speed of the electron at a given radius from the nucleus. 
B) specifies the probable momentum of the electron at a given radius from the nucleus. 
C) describes the probable energy of the electron at a given radius from the nucleus. 
D) gives the probability of finding one electron near another at a given radius from the nucleus. 
E) gives the probability of finding the electron at a given radius from the nucleus. 
A) specifies the probable speed of the electron at a given radius from the nucleus. 
B) specifies the probable momentum of the electron at a given radius from the nucleus. 
C) describes the probable energy of the electron at a given radius from the nucleus. 
D) gives the probability of finding one electron near another at a given radius from the nucleus. 
E) gives the probability of finding the electron at a given radius from the nucleus.

Question 13

Which of the following statements is a valid conclusion from the Heisenberg uncertainty principle?

Accepted Answer

A) The square of the wave function is proportional to the probability of finding a particle in space. 
B) Particles can exhibit wavelike behavior. 
C) The orbits proposed by Bohr's model of the atom are correct. 
D) An electron in a 2p orbital is always closer to the nucleus than an electron in a 3p orbital. 
E) The act of measuring a particle's position changes its momentum,and vice versa. 
A) The square of the wave function is proportional to the probability of finding a particle in space. 
B) Particles can exhibit wavelike behavior. 
C) The orbits proposed by Bohr's model of the atom are correct. 
D) An electron in a 2p orbital is always closer to the nucleus than an electron in a 3p orbital. 
E) The act of measuring a particle's position changes its momentum,and vice versa.

Question 14

Which type of electromagnetic radiation has the lowest energy?

Accepted Answer

A) gamma rays 
B) x rays 
C) red light 
D) blue light 
E) radio waves 
A) gamma rays 
B) x rays 
C) red light 
D) blue light 
E) radio waves

Question 15

What is the energy per mole of photons with a wavelength of 307.1 nm?
(c=3.00×108 m/s,h=6.63×10-34 J·s,NA=6.02×1023mol-1)

Accepted Answer

A) ​ 6.48×10-19 kJ/mol 
B) ​1.85×1014 kJ/mol 
C) ​5.88×1035 kJ/mol 
D) ​9.77×1014 kJ/mol 
E) ​3.9×102 kJ/mol 
A) ​ 6.48×10-19 kJ/mol 
B) ​1.85×1014 kJ/mol 
C) ​5.88×1035 kJ/mol 
D) ​9.77×1014 kJ/mol 
E) ​3.9×102 kJ/mol

Question 16

The square of the wave function,ψ2,of an electron in an atom

Accepted Answer

A) is inversely proportional to the distance between the electron and the nucleus. 
B) specifies the momentum of the electron. 
C) describes the energy of the electron. 
D) is proportional to the velocity of the electron. 
E) gives the probability of finding the electron in a region of space. 
A) is inversely proportional to the distance between the electron and the nucleus. 
B) specifies the momentum of the electron. 
C) describes the energy of the electron. 
D) is proportional to the velocity of the electron. 
E) gives the probability of finding the electron in a region of space.

Question 17

How many values are there for the magnetic quantum number when the value of the angular momentum quantum number is 3?

Accepted Answer

A) 12 
B) 7 
C) 1 
D) 4 
E) 15 
A) 12 
B) 7 
C) 1 
D) 4 
E) 15

Question 18

Which type of electromagnetic radiation has the lowest frequency?

Accepted Answer

A) microwaves 
B) visible 
C) ultraviolet 
D) infrared 
E) radio waves 
A) microwaves 
B) visible 
C) ultraviolet 
D) infrared 
E) radio waves

Question 19

What is the total number of subshells found in the n = 6 shell?

Accepted Answer

A) 6 
B) 36 
C) 5 
D) 7 
E) 8 
A) 6 
B) 36 
C) 5 
D) 7 
E) 8

Question 20

When an electron in an atom makes a transition from n = 4 to n = 5,which of the following statements is/are correct?
I.Energy is emitted.
II.Energy is absorbed.
III.The electron loses energy.
IV.The electron gains energy.
V.The electron cannot make this transition.

Accepted Answer

A) II and IV 
B) II and III 
C) I and IV 
D) I and III 
E) V 
A) II and IV 
B) II and III 
C) I and IV 
D) I and III 
E) V

Exam 7: Quantum Theory of the Atom

Which of the following combinations of quantum numbers is permissible?

A laser emits photons having an energy of 3.74 × 10-19 J.What color would be expected for the light emitted by this laser? (c = 3.00 × 108 m/s,h = 6.63 × 10-34 J ⋅ s)

​What is the frequency of photons that have molar energy of 339.00 kJ/mol? (c​ = 3.00 × 108 m/s,h ​= 6.63 × 10-34 J·s,​NA = 6.02 × 1023 mol-1)

What is the value of the angular momentum quantum number for an electron in a 1s orbital?

If the location of a particular electron can be measured only to a precision of​ 0.069 nm,what is the minimum uncertainty in the electron's velocity? (me=9.109×10-31 kg,c=3.00×108 m/s,h=6.63×10-34 J·s)

Which quantum number distinguishes the different shapes of the orbitals?

The wavelength of a gamma ray is 4 × 10-11 m.Calculate the frequency of the ray.

Which hydrogen atom orbital has an energy essentially identical to a 3d orbital?

Which of the following scientists first postulated that the sharp lines in the emission spectra of elements were caused by electrons going from high-energy levels to low-energy levels?

The number of orbitals in a p subshell is

What is the wavelength of photons that have molar energy of 515 kJ/mol? (c = 3.00 × 108 m/s,h = 6.63 × 10-34 J · s,NA = 6.02 × 1023 mol-1)​​

A radial probability plot for an electron in an atom,like that shown below,

Which of the following statements is a valid conclusion from the Heisenberg uncertainty principle?

Which type of electromagnetic radiation has the lowest energy?

What is the energy per mole of photons with a wavelength of 307.1 nm? (c=3.00×108 m/s,h=6.63×10-34 J·s,NA=6.02×1023mol-1)

The square of the wave function,ψ2,of an electron in an atom

How many values are there for the magnetic quantum number when the value of the angular momentum quantum number is 3?

Which type of electromagnetic radiation has the lowest frequency?

What is the total number of subshells found in the n = 6 shell?

When an electron in an atom makes a transition from n = 4 to n = 5,which of the following statements is/are correct? I.Energy is emitted. II.Energy is absorbed. III.The electron loses energy. IV.The electron gains energy. V.The electron cannot make this transition.

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Chemical Reactions

The Gaseous State

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Electron Configurations and Periodicity

Ionic and Covalent Bonding

Molecular Geometry and Chemical Bonding Theory

States of Matter; Liquids and Solids

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Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

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Filters

A laser emits photons having an energy of 3.74 × 10^-19 J.What color would be expected for the light emitted by this laser? (c = 3.00 × 10⁸ m/s,h = 6.63 × 10^-34 J ⋅ s)

What is the frequency of photons that have molar energy of 339.00 kJ/mol? (c = 3.00 × 10⁸ m/s,h = 6.63 × 10^-34 J·s,N_A= 6.02 × 10²³ mol^-1)

If the location of a particular electron can be measured only to a precision of 0.069 nm,what is the minimum uncertainty in the electron's velocity? (m_e=9.109×10^-31 kg,c=3.00×10⁸ m/s,h=6.63×10^-34 J·s)

The wavelength of a gamma ray is 4 × 10^-11 m.Calculate the frequency of the ray.

What is the wavelength of photons that have molar energy of 515 kJ/mol? (c = 3.00 × 10⁸ m/s,h = 6.63 × 10^-34 J · s,N_A = 6.02 × 10²³ mol^-1)

What is the energy per mole of photons with a wavelength of 307.1 nm? (c=3.00×10⁸ m/s,h=6.63×10^-34 J·s,N_A=6.02×10²³mol^-1)

The square of the wave function,ψ²,of an electron in an atom