how magnet attract iron
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Answer:
Most people know that iron is attracted to magnets, while other metals like gold and silver are not. Yet few people can explain exactly why iron has this magical relationship with magnetism. To arrive at the answer, you need to get down to the atomic level and examine the magnetic nature of an atom's electrons.
Electrons and Magnetism
The science behind magnetism, like electricity, comes down to electrons, the negatively charged particles surrounding an atom's nucleus. All electrons have magnetic properties, just as they have electrical properties. When an electron exhibits magnetism, and consequently, it's ability to interact with an external magnetic field, it's said to have a magnetic moment.
An electron's magnetic moment is based on its spin and its orbit, which are both principals of quantum mechanics. Without getting into quantum equations, suffice it to say that an electron's magnetic moment is due to its motion.