In the Bohr model, compare the electron of a $\text{He}^{+}$ ion ($Z = 2$) in the orbit $n = 4$ with the electron of a $\text{Li}^{2+}$ ion ($Z = 3$) in the orbit $n = 6$. For orbit $n$ of a one-electron species, the radius goes as $\dfrac{n^2}{Z}$ and the energy as $-\dfrac{Z^2}{n^2}$. Which of the following are the same for the two electrons?