Question 1

If a hydrogen atom originally in a state with principal quantum number n is excited to state n' = 2n, then

Accepted Answer

A)  its radius and binding energy will double. 
B)  its radius will quadruple and the binding energy will double. 
C)  its radius will double and the binding energy will quadruple. 
D)  its radius will quadruple and the binding energy will be reduced by a factor of four. 
E)  its radius and binding energy will quadruple. 
A)  its radius and binding energy will double. 
B)  its radius will quadruple and the binding energy will double. 
C)  its radius will double and the binding energy will quadruple. 
D)  its radius will quadruple and the binding energy will be reduced by a factor of four. 
E)  its radius and binding energy will quadruple.

Question 2

Which one of the following is the correct electronic configuration for the sodium atom, which has 11 electrons?

Accepted Answer

A)  1s1 2s2 3p6 2s2 
B)  1s2 2s1 3p6 2s2 
C)  1s1 2s2 2p6 2s2 
D)  1s2 2s2 2p6 3s2 
E)  1s2 2s2 2p6 3s1 
A)  1s1 2s2 3p6 2s2 
B)  1s2 2s1 3p6 2s2 
C)  1s1 2s2 2p6 2s2 
D)  1s2 2s2 2p6 3s2 
E)  1s2 2s2 2p6 3s1

Question 3

For the ground state of the hydrogen atom, which of the following numbers represents the correct value of the orbital angular momentum quantum number?

Accepted Answer

A)  -1 
B)  1 
C)  0 
D)  2 
E)  -2 
A)  -1 
B)  1 
C)  0 
D)  2 
E)  -2

Question 4

What is the electron configuration for Li, which has 3 electrons?

Accepted Answer

A)  1s3 
B)  1s1 2s2 
C)  1s2 2s1 
D)  1s2 1p1 
E)  1s1 2s1 3s1 
A)  1s3 
B)  1s1 2s2 
C)  1s2 2s1 
D)  1s2 1p1 
E)  1s1 2s1 3s1

Question 5

What is the shortest wavelength of the Lyman series?

Accepted Answer

A)  91.16 nm 
B)  45.60 nm 
C)  121.5 nm 
D)  204.1 nm 
E)  365 nm 
A)  91.16 nm 
B)  45.60 nm 
C)  121.5 nm 
D)  204.1 nm 
E)  365 nm

Question 6

What value of n corresponds to a wavelength of 922.7 nm in the Paschen series?

Accepted Answer

A)  3 
B)  5 
C)  7 
D)  9 
E)  15 
A)  3 
B)  5 
C)  7 
D)  9 
E)  15

Question 7

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 8

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. 
A)  noble gases. 
B)  halogens. 
C)  alkali metals. 
D)  transition elements.

Question 9

The shortest wavelength of a photon that can be emitted by a hydrogen atom, for which the initial state is $n = 12 ,$ is closest to which one of the following values? $\left( c = 3.0 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } \right.$ $h = 6.626 \times 10 ^{- 34} \mathrm {~J} \cdot \mathrm { s }$ $\left. 1 \mathrm { eV } = 1.60 \times 10 ^ { - 19 } \mathrm {~J} \right)$

Accepted Answer

A)  92 nm 
B)  82 nm 
C)  72 nm 
D)  62 nm 
E)  52 nm 
A)  92 nm 
B)  82 nm 
C)  72 nm 
D)  62 nm 
E)  52 nm

Question 10

What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state n = 4 jumps to the final state n = 2? 
(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ∙ s, 1 eV = 1.60 × 10-19 J)

Accepted Answer

A)  243 nm 
B)  486 nm 
C)  556 nm 
D)  312 nm 
E)  609 nm 
A)  243 nm 
B)  486 nm 
C)  556 nm 
D)  312 nm 
E)  609 nm

Question 11

What is the greatest magnitude of the orbital angular momentum L that you can find in a state with n = 6 ?

Accepted Answer

A)  5.48 $\frac { h } { 2 \pi }$ 
B)  5.92 $\frac { h } { 2 \pi }$ 
C)  6 $\frac { h } { 2 \pi }$ 
D)  6.48 $\frac { h } { 2 \pi }$ 
A)  5.48 $\frac { h } { 2 \pi }$ 
B)  5.92 $\frac { h } { 2 \pi }$ 
C)  6 $\frac { h } { 2 \pi }$ 
D)  6.48 $\frac { h } { 2 \pi }$

Question 12

When an electron jumps from an orbit where n = 4 to one where n = 2

Accepted Answer

A)  a photon is emitted. 
B)  a photon is absorbed. 
C)  two photons are emitted. 
D)  two photons are absorbed. 
E)  None of the given answers are correct. 
A)  a photon is emitted. 
B)  a photon is absorbed. 
C)  two photons are emitted. 
D)  two photons are absorbed. 
E)  None of the given answers are correct.

Question 13

What is the energy required to remove the electron from a hydrogen atom in the n = 11 state?

Accepted Answer

A)  0.112 eV 
B)  1.24 eV 
C)  13.5 eV 
D)  12.4 eV 
E)  0.141 eV 
A)  0.112 eV 
B)  1.24 eV 
C)  13.5 eV 
D)  12.4 eV 
E)  0.141 eV

Question 14

The magnetic quantum number m1 can have any integer value ranging from

Accepted Answer

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

Question 15

What is the value of n in the Balmer series for which the wavelength is 410.2 nm.

Accepted Answer

A)  4 
B)  5 
C)  6 
D)  7 
E)  9 
A)  4 
B)  5 
C)  6 
D)  7 
E)  9

Question 16

A hydrogen atom is in the 6h state. Which one of the following numbers could be an orbital angular momentum quantum number ℓ for that state?

Accepted Answer

A)  5 
B)  6 
C)  7 
D)  8 
E)  9 
A)  5 
B)  6 
C)  7 
D)  8 
E)  9

Question 17

Calculate the orbital Bohr radius of the $n = 2$ excited state in a hydrogen atom. $( r \mathrm { 1 } = 0.0529 \mathrm {~nm} )$

Accepted Answer

A)  0.212 nm 
B)  0.106 nm 
C)  0.170 nm 
D)  0.244 nm 
A)  0.212 nm 
B)  0.106 nm 
C)  0.170 nm 
D)  0.244 nm

Question 18

Write out the electron configuration for the ground state of the phosphorus atom, which has 15 electrons.

Accepted Answer

The answer of Write out the electron configuration for the...

Question 19

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 20

The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy states for the transition that produces this light? (c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ∙ s)

Accepted Answer

A)  1.54 eV 
B)  1.65 eV 
C)  1.79 eV 
D)  1.81 eV 
A)  1.54 eV 
B)  1.65 eV 
C)  1.79 eV 
D)  1.81 eV

Exam 29: Atoms and Molecules

If a hydrogen atom originally in a state with principal quantum number n is excited to state n' = 2n, then

Which one of the following is the correct electronic configuration for the sodium atom, which has 11 electrons?

For the ground state of the hydrogen atom, which of the following numbers represents the correct value of the orbital angular momentum quantum number?

What is the electron configuration for Li, which has 3 electrons?

What is the shortest wavelength of the Lyman series?

What value of n corresponds to a wavelength of 922.7 nm in the Paschen series?

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 that have completely filled shells or subshells are referred to as

What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state n = 4 jumps to the final state n = 2? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ∙ s, 1 eV = 1.60 × 10-19 J)

What is the greatest magnitude of the orbital angular momentum L that you can find in a state with n = 6 ?

When an electron jumps from an orbit where n = 4 to one where n = 2

What is the energy required to remove the electron from a hydrogen atom in the n = 11 state?

The magnetic quantum number m1 can have any integer value ranging from

What is the value of n in the Balmer series for which the wavelength is 410.2 nm.

A hydrogen atom is in the 6h state. Which one of the following numbers could be an orbital angular momentum quantum number ℓ for that state?

Calculate the orbital Bohr radius of the n=2n = 2n=2 excited state in a hydrogen atom. (r1=0.0529 nm)( r \mathrm { 1 } = 0.0529 \mathrm {~nm} )(r1=0.0529 nm)

Write out the electron configuration for the ground state of the phosphorus atom, which has 15 electrons.

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

The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy states for the transition that produces this light? (c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ∙ s)

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What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state n = 4 jumps to the final state n = 2? (c = 3.00 × 10⁸ m/s, h = 6.626 × 10^-34 J ∙ s, 1 eV = 1.60 × 10^-19J)

The magnetic quantum number m₁ can have any integer value ranging from

Calculate the orbital Bohr radius of the $n = 2$ excited state in a hydrogen atom. $( r \mathrm { 1 } = 0.0529 \mathrm {~nm} )$

The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy states for the transition that produces this light? (c = 3.00 × 10⁸ m/s, 1 eV = 1.60 × 10^-19J, h = 6.626 × 10^-34 J ∙ s)