Resonant states refer to a concept in physics and chemistry that describes the temporary states in which a system can exist before transitioning to a stable state. These states typically occur when a system is in a state of resonance, where it is able to absorb and store energy at a particular frequency. Resonant states are commonly studied in the fields of quantum mechanics, nuclear physics, and atomic physics, among others. They play a crucial role in understanding the behavior of various systems, such as molecules, atoms, and subatomic particles. Researchers study resonant states to gain insights into the dynamics of these systems, as well as to provide a deeper understanding of their properties and interactions. By analyzing resonant states, scientists can uncover valuable information about the nature of matter and the underlying principles that govern the behavior of physical systems.