The quantum mechanical model describes electrons as:

particles with wave-like properties

is the solution to a differential equation known as a wave equation that describes the structure of an atom.

is the solution to a differential equation known as a wave equation that describes the structure of an electron.

is the solution to a differential equation known as a wave equation that describes the structure of an atom.

is the differential equation used to describe the structure of an atom.

is the differential equation used to describe the structure of an electron.

The principle quantum number is related to:

the average distance of the most electron-dense regions from the nucleus

the spatial orientation of the orbital

the average distance of the most electron-dense regions from the nucleus

The angular momentum quantum number is related to n by ___, and describes:

(n-1), the shape of the orbital

(n-1), the spatial orientation of the molecule

(n-1), the shape of the orbital

(n+1), the spatial orientation of the molecule

(n+1), the shape of the orbital

The magnetic quantum number describes the:

spatial orientation of the orbital.

average distance of the most electron-dens regions from the nucleus.

A Short Quantum Physics Quiz

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Quizzes Created: 1 | Total Attempts: 15,511

Questions: 9 | Attempts: 15,526 | Updated: Mar 22, 2023

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Quantum theory is the theoretical basis of modern physics that explains the nature and behavior of matter and energy on the atomic and subatomic levels. This quiz is designed to test the basic knowledge about quantum atomic theory and atomic orbitals. Give it a shot and be better prepared for your class tests!

Questions and Answers

1.

The quantum mechanical model describes electrons as:
- A.
  
  Particles
- B.
  
  Waves
- C.
  
  Particles with wave-like properties
- D.
  
  Small, hard spheres
Correct Answer
C. Particles with wave-like properties

Explanation
The Heisenberg uncertainty principle states that it is impossible to know both the position and momentum of an electron at the same time.

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2.

Heisenberg’s Uncertainty Principle states that the ___ and ___ of an electron cannot be known simultaneously.
- A.
  
  Position, mass
- B.
  
  Position, charge
- C.
  
  Momentum, speed
- D.
  
  Position, momentum
Correct Answer
D. Position, momentum

Explanation
The Heisenberg uncertainty principle states that it is impossible to know both the position and momentum of an electron at the same time.

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3.

A wavefunction:
- A.
  
  Is the solution to a differential equation known as a wave equation that describes the structure of an electron.
- B.
  
  Is the solution to a differential equation known as a wave equation that describes the structure of an atom.
- C.
  
  Is the differential equation used to describe the structure of an atom.
- D.
  
  Is the differential equation used to describe the structure of an electron.
Correct Answer
B. Is the solution to a differential equation known as a wave equation that describes the structure of an atom.

Explanation
A wave function is the solution to a differential equation known as a wave equation that describes the structure of an atom. Wave functions are another way of describing orbitals.

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4.

There are ___ types of quantum numbers.
- A.
  
  2
- B.
  
  7
- C.
  
  4
- D.
  
  5
Correct Answer
C. 4

Explanation
There are 4 types of quantum numbers: the principle quantum number, the angular momentum quantum number, the magnetic quantum number, and the spin quantum number. A complete set of quantum numbers (n, l, ml, and ms) completely describes an orbital.

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5.

The principle quantum number is related to:
- A.
  
  The shape of the orbital
- B.
  
  The spatial orientation of the orbital
- C.
  
  The average distance of the most electron-dense regions from the nucleus
- D.
  
  The number of electrons
Correct Answer
C. The average distance of the most electron-dense regions from the nucleus

Explanation
The principle quantum number is related to the average distance of the most electron-dense regions from the nucleus. Recall the figure in which, as n increases; the distance of the electron from the nucleus increases.

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6.

The angular momentum quantum number is related to n by ___, and describes:
- A.
  
  (n-1), the spatial orientation of the molecule
- B.
  
  (n-1), the shape of the orbital
- C.
  
  (n+1), the spatial orientation of the molecule
- D.
  
  (n+1), the shape of the orbital
Correct Answer
B. (n-1), the shape of the orbital

Explanation
The angular momentum quantum number is related to n by (n-1), and describes the shape of the orbital.

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7.

The different types of subshells and corresponding number of orbitals is:
- A.
  
  S:1, p:3, d:5, f:7
- B.
  
  S:2, p:6, d:10, f:14
- C.
  
  N:1, l:0, m:0
- D.
  
  S:7, p:5, d:3, f:1
Correct Answer
A. S:1, p:3, d:5, f:7

Explanation
The different types of subshells are s, p, d, and f, and correspond to 1, 3, 5, and 7 orbitals. Available orbitals could be 1 s-orbital, 3 p-orbitals, 5-d-orbitals, and 7 f-orbitals.

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8.

The magnetic quantum number describes the:
- A.
  
  Shape of the orbital.
- B.
  
  Spatial orientation of the orbital.
- C.
  
  Average distance of the most electron-dens regions from the nucleus.
- D.
  
  Number of electrons.
Correct Answer
B. Spatial orientation of the orbital.

Explanation
The magnetic quantum number describes the spatial orientation of the orbital. Recall that l defines the shape of the orbital, and ml defines the orientation with respect to a standard coordinate system.

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9.

The spin quantum number (m_s) can have a value of:
- A.
  
  -1/2, +1/2
- B.
  
  -1/2, -3/2
- C.
  
  +1, -1
- D.
  
  0, +1
Correct Answer
A. -1/2, +1/2

Explanation
The spin quantum number can have a value of +1/2 or -1/2 for an electron. every orbital can be filled by two electrons, and the spin quantum number defines which electron is being described.

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A Short Quantum Physics Quiz

The quantum mechanical model describes electrons as:

Heisenberg’s Uncertainty Principle states that the ___ and ___ of an electron cannot be known simultaneously.

A wavefunction:

There are ___ types of quantum numbers.

The principle quantum number is related to:

The angular momentum quantum number is related to n by ___, and describes:

The different types of subshells and corresponding number of orbitals is:

The magnetic quantum number describes the:

The spin quantum number (ms) can have a value of:

Heisenberg’s Uncertainty Principle states that the _ and _ of an electron cannot be known simultaneously.

The spin quantum number (m_s) can have a value of: