Which scenario is indicative of paramagnetism?

Paramagnetism is a property of materials that arise from the presence of unpaired electrons within their atomic or molecular structure. When there are unpaired electrons, these electrons can align with an external magnetic field, leading to a net magnetic moment and resulting in paramagnetic behavior. This means the substance will be attracted to a magnetic field.

In contrast, an all-paired electron configuration does not exhibit paramagnetism because all the electrons are paired up, resulting in no net magnetic moment. Atoms with filled outer shells also do not display paramagnetic behavior, as filled shells lead to paired electron configurations. Similarly, a molecule with no magnetic properties would indicate a lack of unpaired electrons and thus would not be paramagnetic.

Recognizing the importance of unpaired electrons helps in predicting and understanding the magnetic properties of various materials.