An iron is made up of particles. What is true about the particles?

Iron is an element with the symbol Fe. It is a silvery-white, lustrous, malleable, ductile, magnetic or magnetizable, metallic element occurring abundantly in combined forms, notably in hematite, limonite, magnetite, and taconite, and used alloyed in a wide range of important structural materials. Iron is the fourth most abundant element in the crust of the Earth (5%).