Question

How do magnets attract or repel? Can they stick to all types of metals?

Answer 1

Magnets interact via magnetic poles. Like poles (North-North or South-South) repel each other, while opposite poles (North-South) attract each other.

No, magnets cannot stick to all types of metals. They only attract ferromagnetic metals such as iron, cobalt, and nickel, while ignoring metals like aluminium and copper.