Radius of cation and anion ( `A^(2+)`and `B^(2-)`) is 100 and 241.42 pm respectively. What is the edge length of the cubic unit cell formed when `A^(2+)` and `B^(2-)` are packed together?

Explanation

To find the edge length of the cubic unit cell formed by the cation \( A^{2+} \) and the anion \( B^{2-} \), we can follow these steps:

### Step 1: Identify the given data
- Radius of cation \( A^{2+} = 100 \) pm
- Radius of anion \( B^{2-} = 241.42 \) pm

### Step 2: Calculate the radius ratio
We need to find the radius ratio of the cation to the anion:
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