Quantum mechanics is the branch of physics that deals with the
behavior of matter and light on a subatomic and atomic level. It attempts to
explain the properties of atoms and molecules and their fundamental
particles like protons, neutrons, electrons, gluons, and quarks. Quantum
mechanics can describe many phenomena that classical physics cannot,
such as the wave-particle duality, the uncertainty principle, and the
quantization of energy. Quantum mechanics is also the foundation of many
fields of science and technology, such as quantum chemistry, quantum
field theory, quantum information, and quantum computing