Question

why iron ,cobalt , nickel attach with magnet not other metal? explain.

Answer 1

Iron, Cobalt, Nickel are ferromagnetic. Ferromagnetic means they are attracted to magnets and can be magnetized themselves. Most metals aren't magnetic with the exception of iron, nickel, cobalt. BecauseNickel (Ni) is ferromagnetic it is used in making Alnico magnets (consisting of aluminium, nickel, and cobalt).
Therefore, Iron, Cobalt, Nickel get attached to a magnet whereas other substances don't.

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Answer 2

A magnetic field is created by movement of electrons. If a current of electrons is moving North the electric field will be created pointing West. The transaction matter of iron Cobalt and Nickel have free electrons in their sub orbitz which can move together creating an electric current and resulting magnetic force field. When the force field of the metal( iron Cobalt and Nickel) is align with the force field of the magnet and the metal will be attracted to the magnet.

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