Paramagnetism: The substances that are attracted by a magnetic field are called
paramagnetic substances. Some examples of paramagnetic substances are O2, Cu2t, Fe3t,
and Cr3t.
Paramagnetic substances get magnetised in a magnetic field in the same direction, but
lose magnetism when the magnetic field is removed. To undergo paramagnetism, a
substance must have one or more unpaired electrons. This is because the unpaired
electrons are attracted by a magnetic field, thereby causing paramagnetism.