Define quantum mechanical or wave mechanical model of atom.
These models of atom are based on the wave theory and quantum theory respectively.
The quantum mechanical modeldescribes the probable location of electrons in atoms by describing: Principal energy level, energy sublevel, orbital(in each sub-level), spin.
Wave mechanical model isa theory, which states that the electrons have dual nature and are similar to the wave of energy as well as particles. It is also known as quantum mechanical theory.