Calculate the energy associated with the second orbital of $\mathrm{Li}^{2+}$. What is the radius of

Question

Calculate the energy associated with the second orbital of $\mathrm{Li}^{2+}$. What is the radius of this orbit?

Professor PC Thomas Classes · Answer

$E_n = -13.6 \frac{Z^2}{n^2}$ eV and $r_n = 0.0529 \frac{n^2}{Z}$ nm. For $\mathrm{Li}^{2+}$, $Z=3$, $n=2$. Calculates to Option B.