The ionization energy for the hydrogen atom is `13.6 eV` then calculate the required energy in `eV` to excite it from the ground state to `1^(st)` excited state.

Explanation

To solve the problem of calculating the energy required to excite a hydrogen atom from its ground state to the first excited state, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Ionization Energy**: The ionization energy of the hydrogen atom is given as \( 13.6 \, \text{eV} \). This is the energy required to remove the electron from the ground state (n=1) to infinity (n=∞).

2. **Energy of the Ground State**: The energy of the ground state (n=1) is defined as:
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