Silver crystallises with face - centred cubic unit cells .each side of the unit cell has a length of 409 pm . What is the radius of an atom of silver ? (Assume that each face atom is touching the four corner atoms.)

Explanation

To find the radius of an atom of silver in a face-centered cubic (FCC) unit cell, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the FCC Structure**: In a face-centered cubic structure, atoms are located at each corner of the cube and at the center of each face. The atoms at the face center touch the corner atoms.

2. **Identify the Given Data**:
- The edge length of the unit cell (a) is given as 409 picometers (pm).
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