Iron crystallizes in the body-centered cubic structure with an edge length of 286. (a) Calculate the radius (in pm) of an atom of Fe to 4 significant…

Iron crystallizes in the body-centered cubic structure with an edge length of 286.6 pm.
(a) Calculate the radius (in pm) of an atom of Fe to 4 significant figures.
(b) Calculate the density of the metal to 4 significant figures.