Question

What is Quantum Theory? Explain its four types.

Answer 1

Quantum theory is the theoretical basis of modernphysics that explains the nature and behavior of matter and energy on the atomic and subatomic level. ... Planck wrote a mathematical equation involving a figure to represent these individual units of energy, which he called quanta.

To completely describe an electron in an atom, four quantum numbers are needed: energy (n), angular momentum (ℓ), magnetic moment (mℓ), and spin (ms). ... The value of n ranges from 1 to the shell containing the outermost electron of that atom. The dynamics of any quantum system are described by a quantumHamiltonian (H).