i want to know why iron has strong magnetic properties than other mettles like copper,silver etc?
Metals like iron exhibit what is called Ferromagnetism. The property of ferromagnetism is due to the direct influence of two effects from quantum mechanics: spin and the Pauli exclusion principle. The spin of an electron, combined with its orbital angular momentum, results in a magnetic dipole moment and creates a magnetic field. In many materials (specifically, those with a filled electron shell), however, the total dipole moment of all the electrons is zero (e.g., the spins are in up/down pairs thus cancelling each other out). Only atoms with partially filled shells (e.g., unpaired spins) can experience a net magnetic moment in the absence of an external field. A ferromagnetic material has many such electrons, and if they are aligned they create a measurable macroscopic field. Hence, if you rub a piece of iron with a magnet, the piece of iron will become magnetized.
