The birth of wave mechanics:(1)1924, de Broglie postulated that material particles would show wave-like characteristics; (2)1926, Schrodinger introduced an equation to define these characteristics. (3)1900, First proposed the conception of‘ quanta’ Quantum development: (1) The ' old quantum mechanics: Associate with the Bohr model of the atom;(2) The ' quantum mechanics: Associate mainly with the work of Heisenberg.(What is the aim of quantum mechanics proposed?)The birth of wave mechanics: (1) 1924, de Broglie postulated that material particles would show wave-like characteristics;(2)1926, Schrödinger introduced an equation to define these characteristics. (3)1900, First proposed the conception of ‘quanta’. Quantum development: (1) The ‘old’ quantum mechanics: Associate with the Bohr model of the atom; (2) The ‘new’ quantum mechanics: Associate mainly with the work of Heisenberg. (What is the aim of quantum mechanics proposed?)