Source google image: http://opentextbc.ca/introductorychemistry/wp-content/uploads/sites/17/2014/01/Stylized-molecular-energy-diagram-with-labels.png
Schema electrique arc6670
Source google image: http://opentextbc.ca/introductorychemistry/wp-content/uploads/sites/17/2014/01/Stylized-molecular-energy-diagram-with-labels.png