Question 1

In a hydrogen atom, an electron with n = 7 can exist in how many different quantum states?

Accepted Answer

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

Question 2

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

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 4 
E) 8 
A) 0 
B) 1 
C) 2 
D) 4 
E) 8

Question 3

The spin quantum number can have values of

Accepted Answer

A) -1/2 -1, 0, +1, +1/2 
B) -1/2 -1, +1, +1/2 
C) -1/2, 0, +1/2 
D) -1/2, +1/2. 
A) -1/2 -1, 0, +1, +1/2 
B) -1/2 -1, +1, +1/2 
C) -1/2, 0, +1/2 
D) -1/2, +1/2.

Question 4

The orbital angular momentum quantum number can take which of the following values for any given value of the principal quantum number, n?

Accepted Answer

A) ℓ = 0, 1, 2, . . . 
B) ℓ = 0, 1, 2, . . . , n 
C) ℓ = 0, 1, 2, . . . , (n - 1) 
D) ℓ = 1, 2, 3, 4, . . . 
E) ℓ = 1, 2, 3, 4, . . ., (n + 1) 
A) ℓ = 0, 1, 2, . . . 
B) ℓ = 0, 1, 2, . . . , n 
C) ℓ = 0, 1, 2, . . . , (n - 1) 
D) ℓ = 1, 2, 3, 4, . . . 
E) ℓ = 1, 2, 3, 4, . . ., (n + 1)

Question 5

In a hydrogen atom, a given electron has n = 7. How many values can ℓ have?

Accepted Answer

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

Question 6

Which one of the following is the correct electronic configuration for the sodium atom?

Accepted Answer

A) 1 s12 s23 p62 s2 
B) 1 s22 s13 p62 s2 
C) 1 s12 s22 p6 
D) 1 s22 s22 p63 s2 
E) 1 s22 s22 p63 s1 
A) 1 s12 s23 p62 s2 
B) 1 s22 s13 p62 s2 
C) 1 s12 s22 p6 
D) 1 s22 s22 p63 s2 
E) 1 s22 s22 p63 s1

Question 7

How many possible sets of quantum numbers or 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 8

The Pauli exclusion principle tells us that no two electrons in an atom can have the same quantum number(s)

Accepted Answer

A) n, ℓ, mℓ, and ms. 
B) n, ℓ and mℓ. 
C) mℓ and ms. 
D) n and ℓ. 
E) n. 
A) n, ℓ, mℓ, and ms. 
B) n, ℓ and mℓ. 
C) mℓ and ms. 
D) n and ℓ. 
E) n.

Question 9

According to the selection rule, when a photon is emitted or absorbed, transitions can only occur between state with values of ℓ that differ by

Accepted Answer

A) five units. 
B) four units. 
C) three units. 
D) two units. 
E) one unit. 
A) five units. 
B) four units. 
C) three units. 
D) two units. 
E) one unit.

Question 10

According to Pauli's exclusion principle, how many electrons in an atom may have a particular set of quantum numbers?

Accepted Answer

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

Question 11

Which of the following values are associated with the electron spin quantum number, ms?

Accepted Answer

A) ±1/2 
B) 0 
C) ±1 
D) ±2 
E) ±3 
A) ±1/2 
B) 0 
C) ±1 
D) ±2 
E) ±3

Question 12

In order to produce a hologram, one needs, in addition to an object and a piece of photographic film,

Accepted Answer

A) a beam of monochromatic light and a mirror. 
B) a beam of monochromatic light and a lens. 
C) a beam of monochromatic light, a mirror, and a lens. 
D) a beam of coherent light and a lens. 
E) a beam of coherent light and a mirror. 
A) a beam of monochromatic light and a mirror. 
B) a beam of monochromatic light and a lens. 
C) a beam of monochromatic light, a mirror, and a lens. 
D) a beam of coherent light and a lens. 
E) a beam of coherent light and a mirror.

Question 13

The orbital quantum number can have any integer value ranging from

Accepted Answer

A) 0 to n. 
B) 0 to (n - 1). 
C) 1 to n. 
D) 1 to (n + 1). 
E) 1 to (n - 1). 
A) 0 to n. 
B) 0 to (n - 1). 
C) 1 to n. 
D) 1 to (n + 1). 
E) 1 to (n - 1).

Question 14

According to the quantum mechanical model of the hydrogen atom, if the orbital angular momentum quantum number is ℓ, there will be how many permitted magnetic quantum numbers?

Accepted Answer

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

Question 15

The elements in the periodic table which lack one electron from a filled shell are referred to as

Accepted Answer

A) noble gases. 
B) halogens. 
C) alkali metals. 
D) transition elements. 
E) none of the above. 
A) noble gases. 
B) halogens. 
C) alkali metals. 
D) transition elements. 
E) none of the above.

Question 16

The elements in the periodic table that have completely filled shells or subshells are referred to as

Accepted Answer

A) noble gases. 
B) halogens. 
C) alkali metals. 
D) transition elements. 
E) none of the above. 
A) noble gases. 
B) halogens. 
C) alkali metals. 
D) transition elements. 
E) none of the above.

Question 17

In state n = 1, the energy of the hydrogen atom is -13.58 eV. What is its energy in state n = 2?

Accepted Answer

A) -13.58 eV 
B) -6.79 eV 
C) -4.53 eV 
D) -3.40 eV 
E) -1.51 eV 
A) -13.58 eV 
B) -6.79 eV 
C) -4.53 eV 
D) -3.40 eV 
E) -1.51 eV

Question 18

The energy difference between adjacent orbit radii in a hydrogen atom

Accepted Answer

A) increases with increasing values of n. 
B) decreases with increasing values of n. 
C) remains constant for all values of n. 
D) varies randomly with increasing values of n. 
A) increases with increasing values of n. 
B) decreases with increasing values of n. 
C) remains constant for all values of n. 
D) varies randomly with increasing values of n.

Question 19

In terms of an atom's electron configuration, the letters K, L, M, and N refer to

Accepted Answer

A) different shells with n equal to 1, 2, 3, or 4 respectively. 
B) different sub shells with ℓ equal to 1, 2, 3, or 4 respectively. 
C) the four possible levels for the magnetic quantum number. 
D) the four possible quantum numbers. 
E) none of the above answers. 
A) different shells with n equal to 1, 2, 3, or 4 respectively. 
B) different sub shells with ℓ equal to 1, 2, 3, or 4 respectively. 
C) the four possible levels for the magnetic quantum number. 
D) the four possible quantum numbers. 
E) none of the above answers.

Question 20

According to the quantum mechanical model of the hydrogen atom, if the principal quantum number is n, how many different orbital angular momentum quantum number(s) are permitted?

Accepted Answer

A) n/2 
B) n 
C) 2n 
D) 3n 
E) 4n 
A) n/2 
B) n 
C) 2n 
D) 3n 
E) 4n

Exam 39: Quantum Mechanics of Atoms

In a hydrogen atom, an electron with n = 7 can exist in how many different quantum states?

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

The spin quantum number can have values of

The orbital angular momentum quantum number can take which of the following values for any given value of the principal quantum number, n?

In a hydrogen atom, a given electron has n = 7. How many values can ℓ have?

Which one of the following is the correct electronic configuration for the sodium atom?

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

The Pauli exclusion principle tells us that no two electrons in an atom can have the same quantum number(s)

According to the selection rule, when a photon is emitted or absorbed, transitions can only occur between state with values of ℓ that differ by

According to Pauli's exclusion principle, how many electrons in an atom may have a particular set of quantum numbers?

Which of the following values are associated with the electron spin quantum number, ms?

In order to produce a hologram, one needs, in addition to an object and a piece of photographic film,

The orbital quantum number can have any integer value ranging from

According to the quantum mechanical model of the hydrogen atom, if the orbital angular momentum quantum number is ℓ, there will be how many permitted magnetic quantum numbers?

The elements in the periodic table which lack one electron from a filled shell are referred to as

The elements in the periodic table that have completely filled shells or subshells are referred to as

In state n = 1, the energy of the hydrogen atom is -13.58 eV. What is its energy in state n = 2?

The energy difference between adjacent orbit radii in a hydrogen atom

In terms of an atom's electron configuration, the letters K, L, M, and N refer to

According to the quantum mechanical model of the hydrogen atom, if the principal quantum number is n, how many different orbital angular momentum quantum number(s) are permitted?

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Filters

Which of the following values are associated with the electron spin quantum number, m_s?