A Short Quantum Physics Quiz
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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!
- 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 propertiesExplanation
The Heisenberg uncertainty principle states that it is impossible to know both the position and momentum of an electron at the same time.Rate this question:
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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, momentumExplanation
The Heisenberg uncertainty principle states that it is impossible to know both the position and momentum of an electron at the same time.Rate this question:
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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.Rate this question:
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- 4.
There are ___ types of quantum numbers.
- A.
2
- B.
7
- C.
4
- D.
5
Correct Answer
C. 4Explanation
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.Rate this question:
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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 nucleusExplanation
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.Rate this question:
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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 orbitalExplanation
The angular momentum quantum number is related to n by (n-1), and describes the shape of the orbital.Rate this question:
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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:7Explanation
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.Rate this question:
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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.Rate this question:
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- 9.
The spin quantum number (ms) 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, +1/2Explanation
In quantum mechanics, the spin quantum number (ms) refers to the quantum number associated with the spin angular momentum of a particle. It describes the intrinsic angular momentum of the particle and can have two possible values for a given electron: -1/2 and +1/2.These values are related to the concept of spin up and spin down, which are the two possible orientations of the electron's intrinsic magnetic moment in a magnetic field. The spin quantum number is one of the four quantum numbers used to describe the state of an electron in an atom, along with the principal quantum number (n), the azimuthal quantum number (l), and the magnetic quantum number (m_l).Rate this question:
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Current Version
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Mar 22, 2023Quiz Edited by
ProProfs Editorial Team -
Nov 13, 2009Quiz Created by
Rhartsock10
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