Calculate the radius ratio of `3^(rd) & 5^(th)` orbit of `He^(+)`.
`r=0.529xx(n^(2))/(Z) Å`
At. Number of of He `=2`

Explanation

To calculate the radius ratio of the 3rd and 5th orbits of the He⁺ ion, we will use the formula for the radius of the nth orbit:

\[ r = 0.529 \times \frac{n^2}{Z} \, \text{Å} \]

Where:
- \( r \) is the radius of the orbit,
- \( n \) is the principal quantum number (the orbit number),
- \( Z \) is the atomic number of the element.
...