The Atomic Radius of Aluminum Is 143 Pm

The atomic radius of aluminum is 143 pm.Estimate its density,given that the metal has a close-packed structure.

A) 3.87 g.cm ^{- 3}
B) 5.54 g.cm ^{- 3}
C) 7.92 g.cm ^{- 3}
D) 16.3 g.cm ^{- 3}
E) 2.71 g.cm ^{- 3}