Question

magnetism can be explained in terms of ______ spin patterns.
a. proton
b. electron
c. neutron
d. quark

Explanation:

Identify the origin of atomic magnetism

Using the Electron Spin Magnetism knowledge point

$$ \mu_s = -g_s \frac{e}{2m_e} \mathbf{S} $$

The intrinsic magnetic moment of an atom is primarily due to the spin of its electrons.

Analyze the given options

Using the Electron Spin Magnetism knowledge point

• a. proton: Protons have spin, but their magnetic moments are about 1000 times smaller than those of electrons.
• b. electron: The alignment of electron spins in atoms is the primary source of macroscopic magnetism.
• c. neutron: Neutrons have spin but do not contribute significantly to atomic magnetic domains.
• d. quark: Quarks make up nucleons, but their spins are not used to explain atomic magnetism.

Answer:

• a. proton
• b. electron (Correct answer)
• c. neutron
• d. quark