$K E=+13.6 \times \frac{Z^2}{n^2}$
(A) $\mathrm{KE}_{1,11}=+13.6 \times \frac{1^2}{1^2}=13.6 \mathrm{eV}$
(B) $\mathrm{KE}_{1, \mathrm{Hc}}=+13.6 \times \frac{2^2}{1^2}=13.6 \times 4 \mathrm{eV}$
(C) $\mathrm{KE}_{2, \mathrm{He}^{+}}=+13.6 \times \frac{2^2}{2^2}=13.6 \mathrm{eV}$
(D) $\mathrm{KE}_{2, \mathrm{Li}}{ }^{\mathrm{i}^{+}}=+13.6 \times \frac{3^2}{2^2}=13.6 \times \frac{9}{4} \mathrm{eV}$