Question

Why magnet always attract pieces of iron steel nickel cobalt

Answer 1

The atoms of any element which has electrons with parallel spins behave like a magnet. Magnetic interaction can be observed in substances which are either ferromagnetic or paramagnetic

Answer 2

This is because iron, steel, nickel and cobalt materials exhibiting magnetic properties i.e.,
magnetic lines of forces can pass through them causing the attraction towards the magnet..

Hope this helps you..✌️✌️