Quantum chemistry, also known as molecular quantum mechanics, is the study of how quantum mechanics can be applied to chemical systems, specifically the quantum mechanical calculation of electronic contributions to the physical and chemical properties of molecules, materials, and solutions at the atomic level. , which belongs to physical chemistry. These calculations involve the ability to do calculations while acquiring as much information as possible regarding the main contributions to the estimated wave function, in addition to observable features such as structural, spectral, and thermodynamic properties. Quantum chemistry also deals with calculations of quantum effects on molecular dynamics and chemical kinetics. It comprises methodically applied approximations