Which of the following statements regarding the energy of the stationary state is true in the following one-electron system?

• A
  $-1.09 \times 10^{-18} \ J$ for second orbit of $H$ atom.
• B
  $+2.18 \times 10^{-18} \ J$ for second orbit of $He^{+}$ ion.
• C
  $+8.72 \times 10^{-18} \ J$ for first orbit of $He^{+}$ ion.
• D
  $-2.18 \times 10^{-18} \ J$ for third orbit of $Li^{2+}$ ion.