It is known that alkali metals exhibit paramagnetism independent of temperature. It can be explained as follows. When an external magnetic field H is turned on, free electrons with spins antiparallel to the vector H will begin to rotate along H, but at the same time, in accordance with the Pauli principle, they will move to higher unoccupied energy levels. This process will occur until the decrease in the magnetic energy of the electrons is equal to the increase in their throw

Detailed solution. Format gif