An element E crystallizes in body centred cubic structure. If the edge length of the cell is `1.469 xx 10^(-10)m` and the density is `19.3 g cm^(-3)`, calculate the atomic mass of this element. Also calculate the radius of an atom of the element.

Explanation

To solve the problem step-by-step, we will follow the given information about the body-centered cubic (BCC) structure, the edge length of the unit cell, and the density of the element.

### Step 1: Identify the number of atoms in the unit cell (Z)
In a body-centered cubic structure, there are:
- 8 corner atoms, each contributing \( \frac{1}{8} \) of an atom to the unit cell
- 1 atom at the center contributing 1 whole atom

Thus, the total number of atoms \( Z \) in a BCC unit cell is:
...