|An excitation (light impact) de-excitation (light emission) depiction of the Bohr model of the atom, conceived by Danish physicist Niels Bohr (1913).|
When the electrons move up to less stable outer orbitals, the atom or molecule as a whole, tends to become more reactive, in a sense move more, and thus more likely to take place in combustion-like reactions.
The model was introduced by Danish physicist Niels Bohr in 1913 and has since come to be known as the "Bohr model".
The historical timeline of the adoption of the quantization model of energy and light, aka the quantum hypothesis, the main stepping stones are: energy element (Max Planck, 1900), photon theory of light quanta (Albert Einstein, 1905), the Bohr model of the atom (Niels Bohr, 1913), the structure of spectroscopy (Arnold Sommerfeld, 1916), then the full-fledged quantum mechanics of the Schrodinger equation (Erwin Schrodinger, 1926) and exchange forces (Werner Heisenberg, 1926). 
The Bohr model has huge implications for human molecular theory, by virtue of the fact that 37 to 90 percent of human sensory input (the force that animates humans) is sight; of which only an introductory overview of his application has been worked out in regards to the excitations (visual stimuli inputs and memories) and de-excitations (visual di-stimui and memories) of human interactions during light-induced waking daylight hours. 
In 2015, Ram Poudel, in his “Atomic Analogy of Poverty” (Ѻ), was theorizing about a Bohr model based sociophysics theory of poverty.
1. Mirowski, Philip. (1989). More Heat than Light: Economics as Social Physics, Physics as Nature’s Economics (pg. 71). Cambridge University Press.
2. (a) Thims, Libb. (2007). Human Chemistry (Volume One) (Bohr model, 8+ pgs. ). Morrisville, NC: LuLu.
(b) Thims, Libb. (2007). Human Chemistry (Volume Two) (Bohr, 3+ pgs.). Morrisville, NC: LuLu.
3. Poudel, Ram C., Zheng, Kangbin, Wood, David and McGowan, Joh G. (2015). “Atomic Analogy of Poverty” (pdf), Manuscript, Jun 16.
● Bohr model – Wikipedia.