valence electron


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.

va·lence e·lec·tron

one of the electrons that take part in chemical reactions of an atom.

valence electron

any of the electrons in the highest principal energy level of an atom or ion. They are responsible for the bonding of atoms to form crystals, molecules, and compounds.
References in periodicals archive ?
Students then learn that the periodic table originally grouped elements in columns on the basis of chemical properties, not number of valence electrons.
2] molecule characterizes a 4-body system due to the independence of the orbitals of the two valence electrons as requested by quantum chemistry, under which conditions no exact solution is possible.
Atomic structure, valence electrons, and covalent bonding
These stable clusters contain eight valence electrons.
The suggested solution originates with the assumption that valence forces are nonlinear (in the wavefunction), non-local, and of non-potential type due to the deep overlapping of the wavepackets of valence electrons in singlet coupling.
Their crystal structures and the arrangement of their valence electrons (the ones that participate in chemical bonds) reshuffle, Ruoff says, to match those of the unstressed elements in the column to the right on the periodic table -- namely, niobium and tantalum.