👉 Pro-alternation is a concept in quantum mechanics that refers to the phenomenon of a particle or system changing its state from one configuration to another, without any external influence. This can be thought of as an "unstable" state where the system is not stable and may undergo changes over time. In classical physics, pro-alternation occurs when a system exhibits a change in its energy level (i.e., the number of electrons or particles) from one state to another without any external forces.