Final answer:
Alpha decay is represented by the equation 2320 → He + 238TH.
Step-by-step explanation:
The type of decay represented by the equation 2320 → He + 238TH is alpha decay. Alpha decay involves the release of helium ions from the nucleus of an atom. In this decay, the original atom (2320) is converted into a new atom (238TH) with an atomic number two less than the original atom and an atomic weight that is four less.