paramagnetic and diamagnetic

Paramagnetic compounds (and atoms) are attracted to magnetic fields while diamagnetic compounds (and atoms) are repelled from magnetic fields.

Paramagnetic compounds have unpaired electrons while in diamagnetic compounds the electrons all have paired spins.

Very few individual atoms are paramagnetic since this requires having a half-filled MO. In contrast, nearly all molecules are diamagnetic (O₂ is a notable exception). That is, they essentially have all paired electrons in MOs.

See this video of a frog floating in a magnetic field. Why does the frog float? The frog is repelled by the magnetic field since all the molecules that make up the frog (or at least the vast majority of them) are diamagnetic. In addition, the magnet is really strong such that the repulsion of the diamagnetic compounds in the frog is strong enough to overcome gravity.