Gallium crystallizes in a primitive cubic unit cell. The length of the unit cell edge is 3.70Å. The radius of a Ga atom is Å.
A) Insufficient data is given.
B) 7.40
C) 0.930
D) 3.70
E) 1.85

Question

Quizplus · Accepted Answer

In a primitive cubic unit cell, the edge length is twice the radius of the atom. Therefore, the radius of a Ga atom is half of the edge length, which is 3.70 Å / 2 = 1.85 Å.

Gallium Crystallizes in a Primitive Cubic Unit Cell