Question 1

What is the wavelength of the emitted photon if an electron in the hydrogen atom makes a transition from n = 2 state to the ground state?

Accepted Answer

A)  121.5 nm 
B)  203.1 nm 
C)  243.0 nm 
D)  388.8 nm 
E)  411.1 nm 
A)  121.5 nm 
B)  203.1 nm 
C)  243.0 nm 
D)  388.8 nm 
E)  411.1 nm

Question 2

The energy for n = 4 and ℓ = 0 state is greater than the energy for n = 3 and ℓ = 2 state.

Accepted Answer

A) True 
 B)False

Question 3

The kinetic energy of an electron in a Bohr orbit of the hydrogen atom is 8.57 × 10-20 J. What is the radius of the orbit?

Accepted Answer

A)  1.35 × 10-9 m 
B)  2.01 × 10-9 m 
C)  2.64 × 10-9 m 
D)  4.12 × 10-9 m 
E)  5.29 × 10-11 m 
A)  1.35 × 10-9 m 
B)  2.01 × 10-9 m 
C)  2.64 × 10-9 m 
D)  4.12 × 10-9 m 
E)  5.29 × 10-11 m

Question 4

Ernest Rutherford tested Thomson's model by directing a beam of beta particles, at a thin gold foil.

Accepted Answer

A) True 
 B)False

Question 5

The value of a wavelength in the Balmer series is 410.2 nm. What is the value of n?

Accepted Answer

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

Question 6

The kinetic energy of the electron in the first Bohr orbit of hydrogen is 2.18 ×   J.

Accepted Answer

A) True 
 B)False

Question 7

What is the longest wavelength in the Paschen series?

Accepted Answer

A)  2.01 nm 
B)  2.01 μm 
C)  365 nm 
D)  1.88 nm 
E)  1.88 μm 
A)  2.01 nm 
B)  2.01 μm 
C)  365 nm 
D)  1.88 nm 
E)  1.88 μm

Question 8

What value of n corresponds to a wavelength of 91.7 nm in the Lyman series?

Accepted Answer

A)  1 
B)  3 
C)  5 
D)  9 
E)  13 
A)  1 
B)  3 
C)  5 
D)  9 
E)  13

Question 9

The value of a wavelength in the Balmer series is 372.1 nm. What is the value of n?

Accepted Answer

A)  6 
B)  3 
C)  9 
D)  10 
E)  14 
A)  6 
B)  3 
C)  9 
D)  10 
E)  14

Question 10

Which one of the following is the correct electronic configuration for carbon?

Accepted Answer

A)  1s2 2s2 2p2 
B)  1s1 2p1 
C)  1s1 2s2 2p1 
D)  1s1 2s1 2p1 
E)  1s2 2s2 2p4 
A)  1s2 2s2 2p2 
B)  1s1 2p1 
C)  1s1 2s2 2p1 
D)  1s1 2s1 2p1 
E)  1s2 2s2 2p4

Question 11

An electron in the hydrogen atom has a wavelength of 2.67 nm. To what state of the hydrogen atom does this electron belong?

Accepted Answer

A)  n = 2 
B)  n = 5 
C)  n = 8 
D)  n = 11 
E)  n = 14 
A)  n = 2 
B)  n = 5 
C)  n = 8 
D)  n = 11 
E)  n = 14

Question 12

For the ground state of the hydrogen atom, which of the following represents the correct value of the magnetic quantum number?

Accepted Answer

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

Question 13

How many values of the magnetic quantum number, mℓ, correspond to a value of 4 for the orbital quantum number, ℓ?

Accepted Answer

A)  3 
B)  5 
C)  8 
D)  9 
E)  7 
A)  3 
B)  5 
C)  8 
D)  9 
E)  7

Question 14

What is the shortest wavelength in the Paschen series?

Accepted Answer

A)  410.2 nm 
B)  410.2 μm 
C)  365 nm 
D)  820.4 nm 
E)  820.4 μm 
A)  410.2 nm 
B)  410.2 μm 
C)  365 nm 
D)  820.4 nm 
E)  820.4 μm

Question 15

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

Question 16

The ground state of the Li++ ion is at (Li has atomic number 3)

Accepted Answer

A)  -40.8 eV. 
B)  -122 eV. 
C)  Li++ does not have a ground state. 
D)  -61 eV. 
E)  -1.51 eV. 
A)  -40.8 eV. 
B)  -122 eV. 
C)  Li++ does not have a ground state. 
D)  -61 eV. 
E)  -1.51 eV.

Question 17

What is the kinetic energy of an electron in the n = 2 Bohr orbit of the hydrogen atom?

Accepted Answer

A)  2.71 × 10-19 J 
B)  3.20 × 10-19 J 
C)  5.45 × 10-19 J 
D)  6.10 × 10-19 J 
E)  2.16 × 10-18 J 
A)  2.71 × 10-19 J 
B)  3.20 × 10-19 J 
C)  5.45 × 10-19 J 
D)  6.10 × 10-19 J 
E)  2.16 × 10-18 J

Question 18

To which of the following values of n does the longest wavelength in the Balmer series correspond?

Accepted Answer

A)  3 
B)  5 
C)  1 
D)  7 
E)  ∞ (very large) 
A)  3 
B)  5 
C)  1 
D)  7 
E)  ∞ (very large)

Question 19

In a hydrogen atom, the difference in the energy between adjacent orbit radii increases with the increasing value of n.

Accepted Answer

A) True 
 B)False

Question 20

What is the longest wavelength in the Balmer series?

Accepted Answer

A)  240 nm 
B)  328 nm 
C)  365 nm 
D)  656 nm 
E)  820 nm 
A)  240 nm 
B)  328 nm 
C)  365 nm 
D)  656 nm 
E)  820 nm

Exam 31: Atomic Physics

What is the wavelength of the emitted photon if an electron in the hydrogen atom makes a transition from n = 2 state to the ground state?

The energy for n = 4 and ℓ = 0 state is greater than the energy for n = 3 and ℓ = 2 state.

The kinetic energy of an electron in a Bohr orbit of the hydrogen atom is 8.57 × 10-20 J. What is the radius of the orbit?

Ernest Rutherford tested Thomson's model by directing a beam of beta particles, at a thin gold foil.

The value of a wavelength in the Balmer series is 410.2 nm. What is the value of n?

The kinetic energy of the electron in the first Bohr orbit of hydrogen is 2.18 × J.

What is the longest wavelength in the Paschen series?

What value of n corresponds to a wavelength of 91.7 nm in the Lyman series?

The value of a wavelength in the Balmer series is 372.1 nm. What is the value of n?

Which one of the following is the correct electronic configuration for carbon?

An electron in the hydrogen atom has a wavelength of 2.67 nm. To what state of the hydrogen atom does this electron belong?

For the ground state of the hydrogen atom, which of the following represents the correct value of the magnetic quantum number?

How many values of the magnetic quantum number, mℓ, correspond to a value of 4 for the orbital quantum number, ℓ?

What is the shortest wavelength in the Paschen series?

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?

The ground state of the Li++ ion is at (Li has atomic number 3)

What is the kinetic energy of an electron in the n = 2 Bohr orbit of the hydrogen atom?

To which of the following values of n does the longest wavelength in the Balmer series correspond?

In a hydrogen atom, the difference in the energy between adjacent orbit radii increases with the increasing value of n.

What is the longest wavelength in the Balmer series?

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The kinetic energy of an electron in a Bohr orbit of the hydrogen atom is 8.57 × 10^-20 J. What is the radius of the orbit?

How many values of the magnetic quantum number, m_ℓ, correspond to a value of 4 for the orbital quantum number, ℓ?