👉 In physics and chemistry, a subexcitation is an energy level in a given atom or molecule that has less energy than the ground state but more energy than the first excited state. This concept arises from quantum mechanics and is often used to describe transitions between different energy levels of atoms or molecules. For instance, consider a hydrogen atom with three principal quantum numbers (n, l, m) where n = 1, l = 0, and m = 1. In this case, the
