If the electrons closer to the nucleus experience greater electrostatic attraction from the nucleus, would not the closer electrons require more energy to stay in orbit? Also, the electron shielding from the inner electrons would reduce the energy required to stay farther away from the nucleus for electrons in the outer orbitals. I just don't exactly understand what is meant by the phrase higher orbitals have higher energy. In terms of the electrons themselves, I don't exactly understand why electrons in farther orbitals have higher energy than those closer to the nucleus Is it a precursor to being in the orbital? And if so, why? I am currently only in introductory chemistry and physics, and have learned a little about wave functions and how the frequencies of electrons changes as n increases. A clarification on how and why the frequency changes as n increases would also be extremely helpful, along with any additional comments. Thanks!