Question 1

What is the correct electronic configuration for the ground state sodium atom,which has 11 electrons?

Accepted Answer

A)  1s12s23p62s2 
B)  1s22s13p62s2 
C)  1s12s22p6 
D)  1s22s22p63s2 
E)  1s22s22p63s1 
A)  1s12s23p62s2 
B)  1s22s13p62s2 
C)  1s12s22p6 
D)  1s22s22p63s2 
E)  1s22s22p63s1

Question 2

How many electrons can be found with principal quantum number   in a suitably heavy atom?

Accepted Answer

A)  18 
B)  6 
C)  20 
D)  9 
A)  18 
B)  6 
C)  20 
D)  9

Question 3

The correct ground state electron configuration of boron,which has 5 electrons,is

Accepted Answer

A)  1s22s22p. 
B)  1s22s22p3. 
C)  1s21p22s. 
D)  1s22p23s. 
E)  1s22p3. 
A)  1s22s22p. 
B)  1s22s22p3. 
C)  1s21p22s. 
D)  1s22p23s. 
E)  1s22p3.

Question 4

The magnitude of the orbital angular momentum L of an electron in a certain atom is equal to 3.464ħ.What is the orbital quantum number l of the electron?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 5

Electrons in the presence of a magnetic field transition from 4p energy states to 3d states.How many different spectral lines could be observed from these transitions?

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  five 
A)  one 
B)  two 
C)  three 
D)  five

Question 6

How many electrons does it take to fill the d subshell?

Accepted Answer

A)  10 
B)  6 
C)  14 
D)  4 
E)  8 
A)  10 
B)  6 
C)  14 
D)  4 
E)  8

Question 7

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)  (4/3)E0, single degeneracy 
C)  2E0, double degeneracy 
D)  (7/3)E0, double degeneracy 
E)  3E0, triple degeneracy 
A)  2E0, single degeneracy 
B)  (4/3)E0, single degeneracy 
C)  2E0, double degeneracy 
D)  (7/3)E0, double degeneracy 
E)  3E0, triple degeneracy

Question 8

An electron in a hydrogen atom has orbital quantum number l = 7.How many possible values of the magnetic quantum number ml 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 9

If an electron has spin quantum number ms = -1/2 what is the possible value for the orbital quantum number l of the electron?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  11 
E)  All of the above numbers are possible. 
A)  0 
B)  1 
C)  2 
D)  11 
E)  All of the above numbers are possible.

Question 10

Consider the four quantum numbers of an electron in an atom,n,l,ml,and ms.The energy of an electron in an isolated atom depends on

Accepted Answer

A)  n only. 
B)  n and l only. 
C)  n, l, and ml only. 
D)  l, ml, and ms only. 
E)  all four quantum numbers. 
A)  n only. 
B)  n and l only. 
C)  n, l, and ml only. 
D)  l, ml, and ms only. 
E)  all four quantum numbers.

Question 11

What element has a Kα line with wavelength 1.46 × 10-11 m?

Accepted Answer

A)  Zirconium 
B)  Niobium 
C)  Uranium 
D)  Protactinium 
A)  Zirconium 
B)  Niobium 
C)  Uranium 
D)  Protactinium

Question 12

In the ground state,the quantum numbers (n,l,ml,ms)for hydrogen are,respectively

Accepted Answer

A)  1, 1, 1, 1 
B)  1, 0, 0, 0 
C)  1, 0, 0, ± 1/2 
D)  1, 1, 1, ± 1/2 
E)  1, 1, 0, ± 1/2 
A)  1, 1, 1, 1 
B)  1, 0, 0, 0 
C)  1, 0, 0, ± 1/2 
D)  1, 1, 1, ± 1/2 
E)  1, 1, 0, ± 1/2

Question 13

What is the greatest magnitude of the orbital angular momentum L for an electron in a state with principal quantum number n=5?

Accepted Answer

A)  4.47   
B)  4.90   
C)  5   
D)  5.48   
A)  4.47   
B)  4.90   
C)  5   
D)  5.48

Exam 41: Atomic Structure

What is the correct electronic configuration for the ground state sodium atom,which has 11 electrons?

How many electrons can be found with principal quantum number in a suitably heavy atom?

The correct ground state electron configuration of boron,which has 5 electrons,is

The magnitude of the orbital angular momentum L of an electron in a certain atom is equal to 3.464ħ.What is the orbital quantum number l of the electron?

Electrons in the presence of a magnetic field transition from 4p energy states to 3d states.How many different spectral lines could be observed from these transitions?

How many electrons does it take to fill the d subshell?

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?

An electron in a hydrogen atom has orbital quantum number l = 7.How many possible values of the magnetic quantum number ml could it have?

If an electron has spin quantum number ms = -1/2 what is the possible value for the orbital quantum number l of the electron?

Consider the four quantum numbers of an electron in an atom,n,l,ml,and ms.The energy of an electron in an isolated atom depends on

What element has a Kα line with wavelength 1.46 × 10-11 m?

In the ground state,the quantum numbers (n,l,ml,ms)for hydrogen are,respectively

What is the greatest magnitude of the orbital angular momentum L for an electron in a state with principal quantum number n=5?

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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?

An electron in a hydrogen atom has orbital quantum number l = 7.How many possible values of the magnetic quantum number m_l could it have?

If an electron has spin quantum number m_s = -1/2 what is the possible value for the orbital quantum number l of the electron?

Consider the four quantum numbers of an electron in an atom,n,l,m_l,and m_s.The energy of an electron in an isolated atom depends on

What element has a K_α line with wavelength 1.46 × 10^-11m?

In the ground state,the quantum numbers (n,l,m_l,m_s)for hydrogen are,respectively