Noun
valence electron (plural valence electrons)
(chemistry) any of the electrons in the outermost shell of an atom (the valence shell); capable of forming bonds with other atoms
Atoms with full valence electron shells are extremely stable and therefore do not tend to form chemical bonds and have little tendency to gain or lose electrons. Source: Internet
Chemical Bonding, Mark J. Winter, Oxford University Press, 1994, ISBN 0-19-855694-2 Hydrogen, like the alkali metals, has one valence electron and reacts easily with the halogens but the similarities end there. Source: Internet
Having one fewer valence electron than the host atom, it donates a hole resulting in p-type conductivity. Source: Internet
Following the same rules, the carboxylic acid carbon atom gets the other one valence electron from the C−C bond. Source: Internet
Lithium has a low ionization energy and readily gives up its lone valence electron to a fluorine atom, which has a positive electron affinity and accepts the electron that was donated by the lithium atom. Source: Internet
This lowered reactivity is due to the relativistic stabilisation of ununennium's valence electron, increasing ununennium's first ionisation energy and decreasing the metallic and ionic radii ; this effect is already seen for francium. Source: Internet