CHM120H5 Lecture Notes - Lecture 16: Principal Quantum Number, Bohr Model, Pauli Exclusion Principle
Document Summary
Bohr theory (1914) ran into problems when it was applied to atoms other than h, and was soon replaced by quantum mechanics (1926). When quantum mechanics was applied to the h atom, the same energies were calculated for the h atom energy levels as in the bohr model, For n = 1, 2, 3, (applies only to h atom!!) (1) but the method by which they were calculated was entirely different. Quantum mechanics assumes the electron is wave-like, and the planetary orbits of bohr theory (which views the electron as a particle) are discarded. Orbitals, which give us a picture of the most probable locations for the electron in a particular energy state, replace the bohr orbits. Since the electron is viewed as a wave, it is impossible to describe its precise location: an averaged picture is the best we can do!
