Final answer:
The energy of the n=7 energy level in hydrogen-like atoms can be calculated using the Bohr formula for the energies of electron states. The energy is -0.27 eV.
Step-by-step explanation:
The energy of the n=7 energy level in hydrogen-like atoms can be calculated using the Bohr formula for the energies of electron states. According to the Bohr formula, the energy of the nth state is given by En = -13.6 eV / n^2, where n is the principal quantum number. So, for the n=7 energy level, the energy would be:
En = -13.6 eV / (7^2) = -0.27 eV