30 in the Simple Cubic Crystal Structure at Right, the Unit

Multiple Choice

30 In the simple cubic crystal structure at right, the unit cell is outlined in heavy lines which intersect to form the corners at the center of the spheres. If the corners of the unit cells are at the center of the spheres, how many atoms are in one unit cell?

A) 1
B) 2
C) 3
D) 4
E) 6