A Short Quantum Physics Quiz

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A Short Quantum Physics Quiz - Quiz

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 (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, +1/2
    Explanation
    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).

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  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Nov 13, 2009
    Quiz Created by
    Rhartsock10
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