Question

57. Polonium crystallizes in a simple cubic structure. T
edge length of the unit cell is 0.236 nm. What
the radius of polonium atom ?
(1) 0.144 nm
(2) 0.156 nm
(3) 0.118 nm ?** (4) 0.102 nm​

Answer 1

The radius of the polonium atom is 0.118 nm

Explanation:

We are given that:

• The edge length of the unit cell = 0.236 nm
• To Find: The radius of polonium atom "r" = ?

Solution:

The formula to find the radius of the polonium atom is given below.

Edge length = a = 2r

Now Radius "r" = a / 2

Radius = 0.236 / 2  

Radius = 0.118 nm

Thus the radius of the polonium atom is 0.118 nm