The energy required to excite an electron from n = 2 to n = 3 energy level is 47.2 eV. The charge of Nucleus around which the electron is revolving is ne, find n. (in terms of no. of protons)

Explanation

To solve the problem, we need to find the value of \( n \) (the number of protons in the nucleus) given that the energy required to excite an electron from the \( n = 2 \) to \( n = 3 \) energy level is \( 47.2 \, \text{eV} \).

### Step-by-Step Solution:

1. **Understand the Energy Level Formula**:
The energy levels of a hydrogen-like atom are given by the formula:
\[
E_n = -\frac{13.6 Z^2}{n^2} \, \text{eV}
...