Chemistry of impact events on the Moon

Based on the equilibrium thermochemical approach and quenching theory, the formation of Na-, K-, Li-, Si-, Ca-, Al-, Mg-, and Fe-bearing molecules and dust particles in impact-produced clouds formed after collisions between meteoroids and the Moon is considered. Photolysis lifetimes and energies of photolysis products of oxides and hydroxides of the main elements are estimated. The estimated fraction of uncondensed species, and list of the main molecules and their properties regarding photolysis during impact processes may be useful for the analysis of future observations of atoms of alkali and refractory elements in the exospheres of the Moon and Mercury.