Question 1

If the orbital quantum number is l = 4,which one of the following is a possible value for the principal quantum number n?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  8 
A)  1 
B)  2 
C)  3 
D)  4 
E)  8

Question 2

An electron in a hydrogen atom is in the n = 7 shell.How many possible values of the orbital quantum number l could it have?

Accepted Answer

A)  6 
B)  7 
C)  15 
D)  33 
E)  98 
A)  6 
B)  7 
C)  15 
D)  33 
E)  98

Question 3

Consider the n = 9 shell.
(a)What is the largest value of the orbital quantum number,l,in this shell?
(b)How many electrons can be placed in this shell?

Accepted Answer

The answer of Consider the n = 9 shell.
(a)What is...

Question 4

An electron in a hydrogen atom has orbital quantum number l = 4.How many possible values of the magnetic quantum number ml could it have?

Accepted Answer

A)  4 
B)  10 
C)  5 
D)  9 
E)  3 
A)  4 
B)  10 
C)  5 
D)  9 
E)  3

Question 5

The only VALID electron state and shell designation among the following is

Accepted Answer

A)  1p, K. 
B)  2s, K. 
C)  1s, L. 
D)  2p, L. 
E)  3f, M. 
A)  1p, K. 
B)  2s, K. 
C)  1s, L. 
D)  2p, L. 
E)  3f, M.

Question 6

How many possible sets of quantum numbers (electron states)are there in the 5f subshell?

Accepted Answer

A)  2 
B)  6 
C)  8 
D)  10 
E)  14 
A)  2 
B)  6 
C)  8 
D)  10 
E)  14

Question 7

What is the wavelength of the Kα line for Mercury?

Accepted Answer

A)  1.94 × 10-11 m 
B)  5.38 × 10-12 m 
C)  1.85 × 10-11 m 
D)  3.02 × 10-12 m 
A)  1.94 × 10-11 m 
B)  5.38 × 10-12 m 
C)  1.85 × 10-11 m 
D)  3.02 × 10-12 m

Question 8

An electron in a hydrogen atom has principal quantum number n = 4.How many possible values of the orbital quantum number l could it have?

Accepted Answer

A)  8 
B)  9 
C)  3 
D)  4 
E)  10 
A)  8 
B)  9 
C)  3 
D)  4 
E)  10

Question 9

For each value of the principal quantum number n,what are the possible values of the electron spin quantum number ms? (There may be more than one correct choice.)

Accepted Answer

A)  0 
B)  +1/2 
C)  -1/2 
D)  +3/2 
E)  -3/2 
A)  0 
B)  +1/2 
C)  -1/2 
D)  +3/2 
E)  -3/2

Question 10

A three-dimensional potential well has potential U0 = 0 in the region   ,and   and infinite potential otherwise.The ground state energy of a particle in the well is E0.What is the energy of the first excited state,and what is the degeneracy of that state?

Accepted Answer

A)  2E0, single degeneracy 
B)  2E0, triple degeneracy 
C)  3E0, single degeneracy 
D)  6E0, single degeneracy 
E)  6E0, triple degeneracy 
A)  2E0, single degeneracy 
B)  2E0, triple degeneracy 
C)  3E0, single degeneracy 
D)  6E0, single degeneracy 
E)  6E0, triple degeneracy

Question 11

Doubly-ionized lithium is a hydrogen-like ion,in which the nucleus with charge 3e is orbited by a single electron.What wavelength light would be emitted from Li++ as the electron dropped from the n = 4 to the n = 3 orbit?

Accepted Answer

A)  16.9 µm 
B)  1.88 µm 
C)  470 nm 
D)  208 nm 
A)  16.9 µm 
B)  1.88 µm 
C)  470 nm 
D)  208 nm

Question 12

The magnitude of the orbital angular momentum L of an electron in a certain atom is equal to 3.464ħ.Which one of the following numbers could be the principal quantum number n of the electron?

Accepted Answer

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

Question 13

A muonic hydrogen atom is a proton orbited by a muon (a particle with the same charge as an electron and 207 times its mass)in which the mass of the muon is significant relative to the mass of the proton.What would be the radius of the smallest muon orbit in a muonic hydrogen atom?

Accepted Answer

A)  1.03 × 10-8 m 
B)  1.10 × 10-8 m 
C)  2.56 × 10-13 m 
D)  2.84 × 10-13 m 
E)  5.29 × 10-11 m 
A)  1.03 × 10-8 m 
B)  1.10 × 10-8 m 
C)  2.56 × 10-13 m 
D)  2.84 × 10-13 m 
E)  5.29 × 10-11 m

Question 14

An atom with 5 electrons is in its ground state.How many electrons are in its outermost shell?

Accepted Answer

The answer of An atom with 5 electrons is in...

Question 15

What is the minimum speed needed by a ground-state hydrogen atom for its kinetic energy to be enough to ionize the atom in a collision? (1 eV = 1.60 × 10-19 J, mH≈ mproton =1.67 x 10-27 kg)

Accepted Answer

A)  44.2 km/s 
B)  21.7 km/s 
C)  66.5 km/s 
D)  113 km/s 
E)  51.0 km/s 
A)  44.2 km/s 
B)  21.7 km/s 
C)  66.5 km/s 
D)  113 km/s 
E)  51.0 km/s

Question 16

If the principal quantum number of an electron is n = 5,which one of the following is NOT an allowed magnetic quantum number ml for the electron?

Accepted Answer

A)  0 
B)  2 
C)  3 
D)  4 
E)  5 
A)  0 
B)  2 
C)  3 
D)  4 
E)  5

Question 17

If two electrons in the same atom have the same four quantum numbers,then they must have the same energy.

Accepted Answer

A)  True 
B)  False 
C)  They cannot both have the same four quantum numbers. 
A)  True 
B)  False 
C)  They cannot both have the same four quantum numbers.

Question 18

What is the correct electronic configuration for ground state carbon,which has 6 electrons?

Accepted Answer

A)  1s22s22p2 
B)  1s12p1 
C)  1s12s22p1 
D)  1s12s12p1 
E)  1s22s22p4 
A)  1s22s22p2 
B)  1s12p1 
C)  1s12s22p1 
D)  1s12s12p1 
E)  1s22s22p4

Question 19

An atom in a state with its orbital quantum number l = 1 decays to its ground state (with l = 0).A photon of wavelength 630.000 nm is emitted in the process.When the same process takes place in the presence of an intense magnetic field,the following change in the spectrum is observed.With the magnetic field present,one of the emitted lines observed now has a wavelength of 630.030 nm.Which of the following wavelengths would you expect to be also present?

Accepted Answer

A)  629.970 nm 
B)  630.060 nm 
C)  630.090 nm 
D)  630.120 nm 
E)  629.910 nm 
A)  629.970 nm 
B)  630.060 nm 
C)  630.090 nm 
D)  630.120 nm 
E)  629.910 nm

Question 20

What is the radius of the smallest electron orbit in a singly-ionized helium atom?

Accepted Answer

A)  1.32 × 10-11 m 
B)  2.65 × 10-11 m 
C)  5.29 × 10-11 m 
D)  1.06 × 10-10 m 
A)  1.32 × 10-11 m 
B)  2.65 × 10-11 m 
C)  5.29 × 10-11 m 
D)  1.06 × 10-10 m

Exam 41: Atomic Structure

If the orbital quantum number is l = 4,which one of the following is a possible value for the principal quantum number n?

An electron in a hydrogen atom is in the n = 7 shell.How many possible values of the orbital quantum number l could it have?

Consider the n = 9 shell. (a)What is the largest value of the orbital quantum number,l,in this shell? (b)How many electrons can be placed in this shell?

An electron in a hydrogen atom has orbital quantum number l = 4.How many possible values of the magnetic quantum number ml could it have?

The only VALID electron state and shell designation among the following is

How many possible sets of quantum numbers (electron states)are there in the 5f subshell?

What is the wavelength of the Kα line for Mercury?

An electron in a hydrogen atom has principal quantum number n = 4.How many possible values of the orbital quantum number l could it have?

For each value of the principal quantum number n,what are the possible values of the electron spin quantum number ms? (There may be more than one correct choice.)

A three-dimensional potential well has potential U0 = 0 in the region ,and and infinite potential otherwise.The ground state energy of a particle in the well is E0.What is the energy of the first excited state,and what is the degeneracy of that state?

Doubly-ionized lithium is a hydrogen-like ion,in which the nucleus with charge 3e is orbited by a single electron.What wavelength light would be emitted from Li++ as the electron dropped from the n = 4 to the n = 3 orbit?

The magnitude of the orbital angular momentum L of an electron in a certain atom is equal to 3.464ħ.Which one of the following numbers could be the principal quantum number n of the electron?

A muonic hydrogen atom is a proton orbited by a muon (a particle with the same charge as an electron and 207 times its mass)in which the mass of the muon is significant relative to the mass of the proton.What would be the radius of the smallest muon orbit in a muonic hydrogen atom?

An atom with 5 electrons is in its ground state.How many electrons are in its outermost shell?

What is the minimum speed needed by a ground-state hydrogen atom for its kinetic energy to be enough to ionize the atom in a collision? (1 eV = 1.60 × 10-19 J, mH≈ mproton =1.67 x 10-27 kg)

If the principal quantum number of an electron is n = 5,which one of the following is NOT an allowed magnetic quantum number ml for the electron?

If two electrons in the same atom have the same four quantum numbers,then they must have the same energy.

What is the correct electronic configuration for ground state carbon,which has 6 electrons?

What is the radius of the smallest electron orbit in a singly-ionized helium atom?

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Filters

An electron in a hydrogen atom has orbital quantum number l = 4.How many possible values of the magnetic quantum number m_l could it have?

What is the wavelength of the K_α line for Mercury?

For each value of the principal quantum number n,what are the possible values of the electron spin quantum number m_s? (There may be more than one correct choice.)

A three-dimensional potential well has potential U₀= 0 in the region ,and and infinite potential otherwise.The ground state energy of a particle in the well is E₀.What is the energy of the first excited state,and what is the degeneracy of that state?

Doubly-ionized lithium is a hydrogen-like ion,in which the nucleus with charge 3e is orbited by a single electron.What wavelength light would be emitted from Li⁺⁺ as the electron dropped from the n = 4 to the n = 3 orbit?

What is the minimum speed needed by a ground-state hydrogen atom for its kinetic energy to be enough to ionize the atom in a collision? (1 eV = 1.60 × 10^-19 J, m_H≈ m_proton =1.67 x 10^-27kg)

If the principal quantum number of an electron is n = 5,which one of the following is NOT an allowed magnetic quantum number m_l for the electron?