The energy of an electron in an excited hydrogen atom is `- 3.4 e V`. Calculate the angular momentum . Given : Rydbrg's `R = 1.09737 xx 10^(-7) m^(-1)`. Plank's constant `h = 6.626176 xx 10^(-34) J - s`, speed of light`c = 3 xx 10^(8) m s^(-1).

Explanation

To solve the problem of calculating the angular momentum of an electron in an excited hydrogen atom with an energy of `-3.4 eV`, we will follow these steps:

### Step 1: Understand the Energy Formula
The energy of an electron in the nth state of a hydrogen atom is given by the formula:
\[ E_n = -\frac{R_H \cdot h \cdot c}{n^2} \]
where:
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