【Daily Question】Theoretical Foundation 2020.06.19

D. The closer the atomic orbit in which the electron is located to the nucleus, the greater the attractive force exerted by the nucleus on the electron, and the lower the energy of the electron. Conversely, the farther an orbital of dao is from the nucleus, the higher the energy of the electron, which indicates that electrons may have different energies when moving in various atomic orbitals. The different energy states in which electrons exist within an atom are called the energy levels of atomic orbitals. Based on the relative heights of atomic orbital energy levels, they can be divided into several electron shells: K, L, M, N, O, P, Q…. The same electron shell can further be divided into several electron subshells, such as s, p, d, f, etc. Each electron subshell contains several atomic orbitals. The energy levels of atomic orbitals can be determined through spectral experiments, or they can be calculated using the Schrödinger equation. The energy level of an atomic orbital is related to the electron shell and subshell of the electron it belongs to, as well as to the atomic number. E1s＜E2s＜E2p＜E3s＜E3p＜E4s＜E4d＜E4p＜E5s＜E5p＜E6s＜E4f＜E5d Rule E: np＞（n－1）d＞（n－2）f＞ns 1. Relative order of energy levels in different electron shells K