The ionisation energy of `He^(+) " is " 19.6 xx 10^(-18)J` per atom. Calculate the energy of the first stationary state of `Li^(2+)`

Explanation

To calculate the energy of the first stationary state of \( \text{Li}^{2+} \), we can use the formula for the energy of a hydrogen-like atom, which is given by:

\[ E_n = -\frac{Z^2 \cdot 13.6 \, \text{eV}}{n^2} \]

Where:
- \( E_n \) is the energy of the nth stationary state,
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