Most substances are not magnetic under normal circumstances

Most of the substances are composed of molecules, molecules are composed of atoms, and atoms are composed of atomic nucleus and electronics. Inside the atom, the electrons are constantly rotating and rotating around the atom nuclear. These two movements of electrons will produce magneticity. However, in most substances, the direction of the electronic movement is different and chaotic, and the magnetic effects offset each other. Therefore, most substances do not show magneticity under normal circumstances.

Special substance

Ironomagnetic substances such as iron, cobalt, nickel, or iron oxygen are different. The inside of its internal spin can spontaneously arranged in a small area to form a spontaneous magnetized area. This spontaneous magnetized area is called magnetic domain. After the magnetization of ferromagnetic substances, the internal magnetism is neatly neatly arranged and arranged in consistent direction, which enhances magneticity and constitutes magnetic. The iron absorption process of the magnet is the magnetization process of the iron block. The magnetized iron block and the different polarity of the magnets are attractive, and the iron block is firmly "sticky" with the magnet. We say that magnets are magnetic.