Bohr Atom

Bohr Atom:
Perhaps the foremost scientists of the 20th century was Niels Bohr, the first to apply
Planck's quantum idea to problems in atomic physics. In the early 1900's, Bohr
proposed a quantum mechanical description of the atom to replace the early model of
Rutherford.

The Bohr model basically assigned discrete orbits for the electron, multiples of
Planck's constant, rather than allowing a continuum of energies as allowed by classical
physics.

The power in the Bohr model was its ability to predict the spectra of light emitted by
atoms. In particular, its ability to explain the spectral lines of atoms as the absorption
and emission of photons by the electrons in quantized orbits.

In principle, all of atomic and molecular physics, including the structure of atoms and
their dynamics, the periodic table of elements and their chemical behavior, as well as
the spectroscopic, electrical, and other physical properties of atoms and molecules, can
be accounted for by quantum mechanics => fundamental science.