Chemistry
posted by Mark .
A metal crystallizes in a facecentered lattice. The radius of the atom is 198pm and the density of the element is 6.57g/cm^3. What is the identify of the metal?

4r = a(2)^1/2
solve for a.
Then volume = a^3
mass = volume x density. Solve for mass.
mass = 4*atomic mass/6.02E23
Solve for atomic mass.