Potassium Metal Crystallizes in a Body-Centered Cubic Structure with a Unit

Multiple Choice

Potassium metal crystallizes in a body-centered cubic structure with a unit cell edge length of 5.31 Å. The radius of a potassium atom is ________ Å.

A) 1.33
B) 1.88
C) 2.30
D) 2.66
E) 5.31