Explain what is Paramagnetism with suitable examples

Paramagnetism

The substances which are attracted slightly by magnetic field and fo not retain the magnetic property after removal of magnetic field are called paramagnetic substances. For example, o2, Cu2+,Fe3+,Cr3+, magnesium, lithium, etc. substance show paramagnetism because of the presence of unpaired electrons. These unpaired electrons are attracted by magnetic field.