Question

Polonium crystallizes in a simple cubic structure. The edge of the unit cell is $0.236$ nm. What is the radius of the polonium atom?

• A. $0.144$ nm
• B. $0.156$ nm
• C. $0.118$ nm
• D. $0.102$ nm

Answer 1

Answer: (C)

$0.118$ nm

For simple cubic structure

Edgelength $=a=2r$

$a=0.236$ $nm$

$r=\frac{a}{2}=0.118$ $nm$