Outside decoration of the Ubosoth, the main building of Wat Phra Kaew, Grand Palace, Bangkok. I have taken this photo myself in mid 2004 with my own Sony DSC-707. ... Found on http://en.wikipedia.org/wiki/Valence_Electrons
The electrons in the outermost shell of an atom. The valence electrons in this shell are on average farther from the nucleus than other electrons and are often directly involved in chemical reactions. See also: Atom, Core Electron, Electron, Valence Band. Found on https://www.encyclo.co.uk/local/20687