What is the energy of ground state of this atom? — Atomic Structure Chemistry Question

💡 Solution & Explanation

The energy of the ground state is given by $E_1 = -13.6 Z^2$ eV. Substituting $Z=8$, $E_1 = -13.6 \times 8^2 = -13.6 \times 64 = -870.4$ eV. Therefore, correct answer is D.