Question 1

In a shell of the hydrogen atom with n = 3,the permitted values of the orbital magnetic quantum number  
Are

Accepted Answer

A) −1,0,1 
B) 2,1,0 
C) 2,1,0,−1,−2 
D) 0 
E) 3,2,1,0,−1,−2,−3 
A) −1,0,1 
B) 2,1,0 
C) 2,1,0,−1,−2 
D) 0 
E) 3,2,1,0,−1,−2,−3

Question 2

The Pauli Exclusion Principle states

Accepted Answer

A) no two electrons in the same atom can have the same set of quantum numbers. 
B) there is an inherent uncertainty in the position and momentum of a particle. 
C) when an atom has orbitals of equal energy,the maximum number of electrons will have unpaired spins. 
D) when an atom has orbitals of equal energy,the maximum number of electrons will be paired spins. 
E) no two atoms can have the same set of quantum numbers. 
A) no two electrons in the same atom can have the same set of quantum numbers. 
B) there is an inherent uncertainty in the position and momentum of a particle. 
C) when an atom has orbitals of equal energy,the maximum number of electrons will have unpaired spins. 
D) when an atom has orbitals of equal energy,the maximum number of electrons will be paired spins. 
E) no two atoms can have the same set of quantum numbers.

Question 3

The energy needed to change a He+ ion in the ground state into a He2+ ion is

Accepted Answer

A) 13.6 eV 
B) 54.4 eV 
C) 112.4 eV 
D) 92.9 eV 
E) 27.2 eV 
A) 13.6 eV 
B) 54.4 eV 
C) 112.4 eV 
D) 92.9 eV 
E) 27.2 eV

Question 4

An energy of 13.6 eV is needed to ionize an electron from the ground state of a hydrogen atom.Selecting the longest wavelength that will work from the those given below,what wavelength is needed if a photon accomplishes this task?

Accepted Answer

A) 60 nm 
B) 80 nm 
C) 70 nm 
D) 90 nm 
E) 40 nm 
A) 60 nm 
B) 80 nm 
C) 70 nm 
D) 90 nm 
E) 40 nm

Question 5

Characteristic x-rays can be produced by bombarding targets with electrons.These x-rays occur when

Accepted Answer

A) electrons from higher shells fill the vacant lower shell 
B) electrons fill the vacant valence shell 
C) photons are emitted with energies on the order of 103 eV 
D) photons are emitted with wavelengths on the order of 103 nm 
A) electrons from higher shells fill the vacant lower shell 
B) electrons fill the vacant valence shell 
C) photons are emitted with energies on the order of 103 eV 
D) photons are emitted with wavelengths on the order of 103 nm

Question 6

The number of electrons in the n = 4,  
= 2 subshell in strontium (Z = 38)is ____ the number of electrons in the n =4,  
=2 subshell in barium (Z = 56).

Accepted Answer

A)    times 
B)    times 
C) equal to 
D)    times 
E)    times 
A)    times 
B)    times 
C) equal to 
D)    times 
E)    times

Question 7

For the following allowed transitions,which photon would have the largest wavelength when an electron "jumps" from one energy level,characterized by the quantum number n,to another?

Accepted Answer

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

Question 8

The magnitude of the spin angular momentum for an electron is equal to

Accepted Answer

A)    
B)    
C)    /2 
D) ±   /2 
E)    
A)    
B)    
C)    /2 
D) ±   /2 
E)

Question 9

An electron in a hydrogen atom makes a transition from the n = 4 to the n = 3 energy state.Determine the energy (in eV)of the emitted photon.

Accepted Answer

A) 0.54 
B) 0.66 
C) 0.85 
D) 1.51 
E) 10.2 
A) 0.54 
B) 0.66 
C) 0.85 
D) 1.51 
E) 10.2

Question 10

What is the difference in frequency for spectral lines emitted by hydrogen for transitions from the n = 16 level to the n = 2 level and transitions from the n = 15 level to the n = 2 level? (RH = 1.097 × 107 m−1. )

Accepted Answer

A) 5.65 × 10−13 Hz 
B) 31 Hz 
C) 1.77 × 1012 Hz 
D) 2.55 × 1016 Hz 
E) 1.02 × 1017 Hz 
A) 5.65 × 10−13 Hz 
B) 31 Hz 
C) 1.77 × 1012 Hz 
D) 2.55 × 1016 Hz 
E) 1.02 × 1017 Hz

Question 11

The radial portion of the de Broglie wavefunction for an electron in the ground state of the hydrogen atom is Ψ1s(r)= 1/(  
)1/2 exp(−r/a0)where a0 is the Bohr radius.The probability of finding the electron is

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 12

In an allowed electron transition in a hydrogen atom,

Accepted Answer

A) Δ   = 0;   = 0,±1. 
B) Δ   = 0,±1;   = ±1. 
C) Δ   = 0,±1;   = 0,±1. 
D) Δ   = ±1;   = 0,±1. 
E) Δ   = ±1;   = ±1. 
A) Δ   = 0;   = 0,±1. 
B) Δ   = 0,±1;   = ±1. 
C) Δ   = 0,±1;   = 0,±1. 
D) Δ   = ±1;   = 0,±1. 
E) Δ   = ±1;   = ±1.

Question 13

In the Bohr model of the hydrogen atom,the total energy of the electron-proton system is

Accepted Answer

A)    . 
B)    . 
C) 0. 
D)    . 
E)    . 
A)    . 
B)    . 
C) 0. 
D)    . 
E)    .

Question 14

The probability density for the 1s state is given by |Ψ1s|2.The probability of finding the particle somewhere in space is

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 15

What is the difference in wavelength for spectral lines emitted by hydrogen for transitions from the n = 16 level to the n = 2 level and transitions from the n = 15 level to the n = 2 level? (RH = 1.097 × 107 m−1. )

Accepted Answer

A) 1.0 × 10−10 m 
B) 2.0 × 10−10 m 
C) 4.1 × 10−10 m 
D) 8.1 × 10−10 m 
E) 1.6 × 10−9 m 
A) 1.0 × 10−10 m 
B) 2.0 × 10−10 m 
C) 4.1 × 10−10 m 
D) 8.1 × 10−10 m 
E) 1.6 × 10−9 m

Question 16

What wavelength (in μm)is associated with the Paschen series for n = 4? (RH = 1.097 × 107 m−1)

Accepted Answer

A) 320 
B) 530 
C) 2.7 
D) 1.9 
E) 0.5 
A) 320 
B) 530 
C) 2.7 
D) 1.9 
E) 0.5

Question 17

Which of the following,in which n and m have integer values,is a correct formula for a wavelength emitted by a hydrogen atom?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 18

In 1921,Stern and Gerlach performed an experiment that first demonstrated

Accepted Answer

A) orbital angular momentum quantization 
B) energy quantization 
C) space quantization 
D) magnetic orbital quantization 
E) that particles behave like waves 
A) orbital angular momentum quantization 
B) energy quantization 
C) space quantization 
D) magnetic orbital quantization 
E) that particles behave like waves

Question 19

The probability density of a particle at a distance r from the nucleus is essentially the

Accepted Answer

A) probability of finding the particle within a small volume about r. 
B) probability per unit area of finding the particle within a unit area centered on r. 
C) probability per unit length of finding the particle within a unit length of r. 
D) probability per unit volume of finding the particle within a small volume about r. 
E)    
A) probability of finding the particle within a small volume about r. 
B) probability per unit area of finding the particle within a unit area centered on r. 
C) probability per unit length of finding the particle within a unit length of r. 
D) probability per unit volume of finding the particle within a small volume about r. 
E)

Question 20

A Li2+ ion undergoes a transition from the n = 4 to the n = 3 state.The energy of the emitted photon is

Accepted Answer

A) 4.5 eV 
B) 10.2 eV 
C) 5.95 eV 
D) 2.6 eV 
E) 0.66 eV 
A) 4.5 eV 
B) 10.2 eV 
C) 5.95 eV 
D) 2.6 eV 
E) 0.66 eV

Exam 42: Atomic Physics

In a shell of the hydrogen atom with n = 3,the permitted values of the orbital magnetic quantum number Are

The Pauli Exclusion Principle states

The energy needed to change a He+ ion in the ground state into a He2+ ion is

An energy of 13.6 eV is needed to ionize an electron from the ground state of a hydrogen atom.Selecting the longest wavelength that will work from the those given below,what wavelength is needed if a photon accomplishes this task?

Characteristic x-rays can be produced by bombarding targets with electrons.These x-rays occur when

The number of electrons in the n = 4, = 2 subshell in strontium (Z = 38)is ____ the number of electrons in the n =4, =2 subshell in barium (Z = 56).

For the following allowed transitions,which photon would have the largest wavelength when an electron "jumps" from one energy level,characterized by the quantum number n,to another?

The magnitude of the spin angular momentum for an electron is equal to

An electron in a hydrogen atom makes a transition from the n = 4 to the n = 3 energy state.Determine the energy (in eV)of the emitted photon.

What is the difference in frequency for spectral lines emitted by hydrogen for transitions from the n = 16 level to the n = 2 level and transitions from the n = 15 level to the n = 2 level? (RH = 1.097 × 107 m−1. )

The radial portion of the de Broglie wavefunction for an electron in the ground state of the hydrogen atom is Ψ1s(r)= 1/( )1/2 exp(−r/a0)where a0 is the Bohr radius.The probability of finding the electron is

In an allowed electron transition in a hydrogen atom,

In the Bohr model of the hydrogen atom,the total energy of the electron-proton system is

The probability density for the 1s state is given by |Ψ1s|2.The probability of finding the particle somewhere in space is

What is the difference in wavelength for spectral lines emitted by hydrogen for transitions from the n = 16 level to the n = 2 level and transitions from the n = 15 level to the n = 2 level? (RH = 1.097 × 107 m−1. )

What wavelength (in μm)is associated with the Paschen series for n = 4? (RH = 1.097 × 107 m−1)

Which of the following,in which n and m have integer values,is a correct formula for a wavelength emitted by a hydrogen atom?

In 1921,Stern and Gerlach performed an experiment that first demonstrated

The probability density of a particle at a distance r from the nucleus is essentially the

A Li2+ ion undergoes a transition from the n = 4 to the n = 3 state.The energy of the emitted photon is

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The energy needed to change a He⁺ ion in the ground state into a He²⁺ ion is

What is the difference in frequency for spectral lines emitted by hydrogen for transitions from the n = 16 level to the n = 2 level and transitions from the n = 15 level to the n = 2 level? (R_H = 1.097 × 10⁷ m−¹. )

The radial portion of the de Broglie wavefunction for an electron in the ground state of the hydrogen atom is Ψ₁_s(r)= 1/( )^1/2 exp(−r/a₀)where a₀ is the Bohr radius.The probability of finding the electron is

The probability density for the 1s state is given by |Ψ₁_s|².The probability of finding the particle somewhere in space is

What is the difference in wavelength for spectral lines emitted by hydrogen for transitions from the n = 16 level to the n = 2 level and transitions from the n = 15 level to the n = 2 level? (R_H = 1.097 × 10⁷ m−¹. )

What wavelength (in μm)is associated with the Paschen series for n = 4? (R_H = 1.097 × 10⁷ m−¹)

A Li²⁺ ion undergoes a transition from the n = 4 to the n = 3 state.The energy of the emitted photon is