Question

why magnet attracts only metals, why it do not attracts every thing like earth?​

Answer 1

Answer:

In metals there are two types of electrons: bound electrons and free electrons. The free electrons are free to move between atoms, and are the cause of conductivity in metals. The bound electrons are stuck to the individual atoms. ... So, some metals are attracted to magnets because they are full of tinier magnets.

Materials that are not attracted to a magnet like air, wood, plastic, brass, etc., have a permeability of, essentially, 1. There is no magnetism induced in them by an external magnetic field, and therefore, they are not attracted by a magnet.