We’re being asked to calculate the density of barium that crystallizes in a face-centered cubic unit cell.
Recall that the face-centered cubic lattice contains an atom in each of the face of the cube and an atom in each of the corners. It looks like this:
Recall that density has a formula of:
Platinum (Pt) forms a face centered cubic unit cell and has a 139 pm atomic radius. Calculate the density of platinum based on the atomic radius and unit cell.
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