Calculate the radii of 2nd Bohr orbit of`Li^(2+)`

Explanation

To calculate the radius of the 2nd Bohr orbit of the lithium ion \( \text{Li}^{2+} \), we can follow these steps:

### Step 1: Identify the values needed
We know that:
- The principal quantum number \( n = 2 \) (since we are calculating for the second orbit).
- The atomic number \( Z \) for lithium is 3 (since lithium has 3 protons).

### Step 2: Use the formula for the radius of the Bohr orbit
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