Question 1

Which of the following statements is TRUE?

Accepted Answer

A)  The emission spectrum of a particular element is always the same and can be used to identify the element.
B)  Part of the Bohr model proposed that electrons in the hydrogen atom are located in "stationary states" or particular orbits around the nucleus.
C)  The uncertainty principle states that we can never know both the exact location and speed of an electron.
D)  An orbital is the volume in which we are most likely to find an electron.
E)  All of the above are true.

Question 2

Calculate the energy change associated with the transition from n = 4 to n = 1 in the hydrogen atom.

Accepted Answer

A)  +4.89 × 10-18 J
B)  +1.64 × 10-18 J
C)  -6.12 × 10-18 J
D)  +3.55 × 10-18 J
E)  -2.04 × 10-18 J

Question 3

How many orbitals are there in the fourth shell?

Accepted Answer

A)  3
B)  4
C)  6
D)  16

Question 4

Choose the valence orbital diagram that represents the ground state of Sr2⁺.

Accepted Answer

A)   2⁺. 
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B)   2⁺. 
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C)   2⁺. 
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D)   2⁺. 
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E)   2⁺. 
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Question 5

How many photons are contained in a burst of yellow light (589 nm) from a sodium lamp that contains 609 kJ of energy?

Accepted Answer

A)  3.37 × 1019 photons
B)  3.06 × 1030 photons
C)  1.80 × 1024 photons
D)  4.03 × 1028 photons
E)  2.48 × 1025 photons

Question 6

How many orbitals are contained in the n = 2 level? Give the l and ml values of each of them.

Accepted Answer

Four. The 2s and three 2p orbi...

Question 7

Give the number of core electrons for Mg2+.

Accepted Answer

Question 8

How many different values of ml are possible in the 3d sublevel?

Accepted Answer

A)  2
B)  1
C)  3
D)  5
E)  7

Question 9

Choose the valence orbital diagram that represents the ground state of Se2⁻.

Accepted Answer

A)   2⁻. 
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B)   2⁻. 
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C)   2⁻. 
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D)   2⁻. 
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E)   2⁻. 
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Question 10

In which orbital below would an electron (on average) be farthest from the nucleus?

Accepted Answer

A)  1s
B)  4f
C)  3s
D)  3d
E)  2p

Question 11

No two electrons can have the same four quantum numbers. What is this known as?

Accepted Answer

A)  Pauli exclusion principle
B)  Hund's rule
C)  aufbau principle
D)  Heisenberg uncertainty principle

Question 12

How many sublevels are contained in the second shell (n = 2) of a given atom?

Accepted Answer

A)  1
B)  2
C)  9
D)  4
E)  3

Question 13

Why do atoms only emit certain wavelengths of light when they are excited? (Why do line spectra exist?)

Accepted Answer

The energies of atoms are quantized. Whe...

Question 14

Sketch one of the 3p orbitals below. How are they different from the 2p orbitals?

Accepted Answer

They are larger in s...

Question 15

Calculate the velocity of a pickup truck with a de Broglie wavelength of 1.27 × 10-38 m and a mass of 2347 kg.

Accepted Answer

A)  88 km h-1
B)  62.1 km h-1
C)  94 km h-1
D)  79.9 km h-1
E)  106 km h-1

Question 16

Determine the energy change associated with the transition from n = 3 to n = 2 in the hydrogen atom.

Accepted Answer

A)  +3.03 × 10-19 J
B)  -1.82 × 10-19 J
C)  +5.51 × 10-19 J
D)  -3.03 × 10-19 J
E)  +2.69 × 10-19 J

Question 17

Give an example of a p orbital.

Accepted Answer

The answer of Give an example of a p orbital....

Question 18

Only two electrons, with opposing spins, are allowed in each orbital. What is this known as?

Accepted Answer

A)  Pauli exclusion principle
B)  Hund's rule
C)  aufbau principle
D)  Heisenberg uncertainty principle

Question 19

Describe the shape of an s orbital.

Accepted Answer

A)  a ball
B)  two balls
C)  three balls
D)  four balls
E)  eight balls

Question 20

In which orbital below would an electron (on average) be closest to the nucleus?

Accepted Answer

A)  2p
B)  4s
C)  2s
D)  5d
E)  3p

Exam 7: The Quantum-Mechanical Model of the Atom

Give an example of a p orbital.

Correct AnswerverifiedShow Answer

How many orbitals are there in the fourth shell?

Correct AnswerverifiedShow Answer

Only two electrons, with opposing spins, are allowed in each orbital. What is this known as?

Correct AnswerverifiedShow Answer

How many orbitals are contained in the n = 2 level? Give the l and ml values of each of them.

Correct AnswerverifiedFour. The 2s and three 2p orbi...View AnswerShow Answer

Calculate the energy change associated with the transition from n = 4 to n = 1 in the hydrogen atom.

Correct AnswerverifiedShow Answer

In which orbital below would an electron (on average) be closest to the nucleus?

Correct AnswerverifiedShow Answer

In which orbital below would an electron (on average) be farthest from the nucleus?

Correct AnswerverifiedShow Answer

Why do atoms only emit certain wavelengths of light when they are excited? (Why do line spectra exist?)

Correct AnswerverifiedThe energies of atoms are quantized. Whe...View AnswerShow Answer

Give the number of core electrons for Mg2+.

Correct AnswerverifiedShow Answer

Calculate the velocity of a pickup truck with a de Broglie wavelength of 1.27 × 10-38 m and a mass of 2347 kg.

Correct AnswerverifiedShow Answer

Describe the shape of an s orbital.

Correct AnswerverifiedShow Answer

How many different values of ml are possible in the 3d sublevel?

Correct AnswerverifiedShow Answer

How many photons are contained in a burst of yellow light (589 nm) from a sodium lamp that contains 609 kJ of energy?

Correct AnswerverifiedShow Answer

Choose the valence orbital diagram that represents the ground state of Se2⁻.

Correct AnswerverifiedShow Answer

Sketch one of the 3p orbitals below. How are they different from the 2p orbitals?

Correct AnswerverifiedThey are larger in s...View AnswerShow Answer

Determine the energy change associated with the transition from n = 3 to n = 2 in the hydrogen atom.

Correct AnswerverifiedShow Answer

Which of the following statements is TRUE?

Correct AnswerverifiedShow Answer

Choose the valence orbital diagram that represents the ground state of Sr2⁺.

Correct AnswerverifiedShow Answer

No two electrons can have the same four quantum numbers. What is this known as?

Correct AnswerverifiedShow Answer

How many sublevels are contained in the second shell (n = 2) of a given atom?

Correct AnswerverifiedShow Answer

Correct Answer
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How many orbitals are contained in the n = 2 level? Give thel and m_l values of each of them.

Correct Answer
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Four. The 2s and three 2p orbi...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The energies of atoms are quantized. Whe...
View Answer

Give the number of core electrons for Mg²⁺.

Correct Answer
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Calculate the velocity of a pickup truck with a de Broglie wavelength of 1.27 × 10^-38 m and a mass of 2347 kg.

Correct Answer
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Correct Answer
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How many different values of m_l are possible in the 3d sublevel?

Correct Answer
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Correct Answer
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Choose the valence orbital diagram that represents the ground state of Se²⁻.

Correct Answer
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Correct Answer
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They are larger in s...
View Answer

Correct Answer
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Correct Answer
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Choose the valence orbital diagram that represents the ground state of Sr^2⁺.

Correct Answer
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Correct Answer
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Correct Answer
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