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Barium is the largest non-radioactive alkaline earth metal. It has a body-centered-cubic unit cell and a densi?
Barium is the largest non-radioactive alkaline earth metal. It has a body-centered-cubic unit cell and a density of 3.63 g/cm3. What is the atomic radius of barium?
Please explain, not just provide the answer 
thanks, i really want to understand the concept!
A detailed explanation is given at the reference. You have to find the volume of a cube knowing the diagonal is two atoms, then convert the density to one molecule and then calculate the radiaus. It is a detailed problem.
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