Physics - Modern Physics Question with Solution | TestHub

The energy of helium ions.

$E_{\mathrm{n}}=-\frac{13.6\mathrm{ }{\mathrm{Z}}^2}{n^2}\mathrm{ }\mathrm{eV}$

In minimum position, $n=1$.

For $\mathrm{ }{\mathrm{He}}^{+},\mathrm{ }\mathrm{Z}=2$.

$E=\frac{-13.6\mathrm{ }{\times \mathrm{ }\left(2\right)}^2}{1}\mathrm{ }\mathrm{eV}$

$E=-\text{54.4}\mathrm{ }\mathrm{eV}$

Ionization Energy =$-E =54.4 \mathrm{eV}$