Moderate

The magnetic quantum number (m) of a free gaseous atom is associated with:

Correct answer: B. Spatial orientation of an orbital.

  • A. Effective volume of an orbital.
  • B. Spatial orientation of an orbital.
  • C. One-dimensional orientation of an orbital.
  • D. Number of electrons in an orbital.

Explanation

In quantum mechanics, the magnetic quantum number (m) specifies the orientation or magnetic component of an atomic orbital within a given energy level. It determines the number of orbitals in a subshell and the spatial orientation of these orbitals. The value of (m) can range from -l to +l, including zero (where 'l' is azimuthal quantum number). It represents the different possible orientations of an orbital in space. For example, for an s orbital (l = 0), the magnetic quantum number (m) is always zero. For p orbital (l = 1), (m) can take the values -1, 0 or +1, representing the three different orientations along the x, y, and z axes. In summary, the magnetic quantum number (m) of a free gaseous atom is associated with the spatial orientation or magnetic component of atomic orbitals.

Last updated

About Atomic Structure

Atomic structure covers the discovery of the proton, Planck's quantum theory, hydrogen emission spectra and the evidence for quantized energy levels. You will use quantum numbers to describe orbitals, distinguish s, p, d and f orbital shapes, and write electronic configurations, including the correct order of electron filling.

Practise Atomic Structure

922 free Atomic Structure MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Exams that ask Chemistry questions like this

Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.

Related questions