An element crystallizes in b.c.c. lattice with cell edge of 500 pm. The density elements is 7.5g/ml. How many atoms are present in 300 g of the element ?

Explanation

To solve the problem step by step, we need to find out how many atoms are present in 300 g of an element that crystallizes in a body-centered cubic (BCC) lattice with a cell edge of 500 pm and a density of 7.5 g/ml.

### Step 1: Understand the BCC structure
In a BCC 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 atom.

Thus, the total number of atoms per unit cell (Z) is:
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