The radius of first Bohr orbit of hydrogen atom is `0.529 Å`. Calculate the radii of (i) the third orbit of `He^+` ion and (ii) the second orbit of `Li^(2+)` ion.

Explanation

To solve the problem of calculating the radii of the third orbit of the He⁺ ion and the second orbit of the Li²⁺ ion using the Bohr model, we will follow these steps:

### Step-by-Step Solution

1. **Understanding the Formula**:
The radius of the nth orbit in a hydrogen-like atom is given by the formula:
\[
r_n = \frac{R_0 n^2}{Z}
...