If the Radius of a Silicon Atom Is 1

If the radius of a silicon atom is 1.18 x 10-8 cm,what is the radius in nm?

A) 1.18 x 10-15 nm
B) 1.18 x 10-10 nm
C) 1.18 x 10-1 nm
D) 1.18 x 103 nm
E) none of the above