Cobalt has a cubic close-packed structure as a solid. Assuming that cobalt has an 3. atomic radius of 125 pm, calculate the density of solid cobalt. A metallic solid with atoms in a face-centered cubic unit cell with an edge length of 392 pm has a density of 21.45 g/cm³. Calculate the atomic mass and the atomic radius of the metal. Identify the metal. 4.

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