Which type of magnetic behavior is exhibited by materials with no unpaired electrons?

Materials with no unpaired electrons exhibit diamagnetic behavior. This occurs because all the electrons in these materials are paired, and their magnetic moments cancel each other out. As a result, diamagnetic materials do not have a net magnetic moment; they are not attracted to a magnetic field and may even be repelled slightly.

When exposed to an external magnetic field, diamagnetic materials will experience a very weak repulsion due to the induced magnetic field generated by the change in electron motion. This contrasts with paramagnetic materials, which contain unpaired electrons and have a net magnetic moment, allowing them to be attracted to a magnetic field. Ferromagnetic and antiferromagnetic materials also involve magnetic ordering and can exhibit strong magnetic properties, typically involving unpaired electrons, which further distinguishes them from diamagnetic materials.