### The atomic radius of a metal is 2.2 x 10^{-8} cm. The metal crystallizes in a body-centered cubic unit cell. Calculate the unit cell edge length.

### Help Me!

### Select Show Me! if you would like an expert to show
how to answer this type of problem. Select Help Me! if you have a basic idea
how to do this problem, but you would prefer to interact with an expert. Select
Watch Me! if you are confident you know how to do this
problem and you have your answer.

###