Valence band
noun
1.
See energy band
valence band
The outermost electron shell of atoms in an insulator or semiconductor, in which the electrons are too tightly bound to the atom to carry electric current. Compare conduction band. See also bandgap.
Read Also:
- Valence-conduction band
noun 1. See energy band
- Valence-electron
noun, Chemistry. 1. an electron of an atom, located in the outermost shell (valence shell) of the atom, that can be transferred to or shared with another atom. valence electron An electron in one of the outer shells of an atom that can participate in forming chemical bonds with other atoms.
- Valence-shell
noun, Chemistry. 1. an electron of an atom, located in the outermost shell (valence shell) of the atom, that can be transferred to or shared with another atom. valence electron An electron in one of the outer shells of an atom that can participate in forming chemical bonds with other atoms.
- Valencia
noun 1. Guillermo León [gee-yer-maw le-awn] /giˈyɛr mɔ lɛˈɔn/ (Show IPA), 1909–71, Colombian diplomat and statesman: president 1962–66. 2. a province in E Spain: the region was formerly a Moorish kingdom. 9085 sq. mi. (23,530 sq. km). 3. a seaport in E Spain. 4. a city in N Venezuela. 5. a variety of the sweet […]
- Valencia simple tasker
operating system (VSTa) A small microkernel based Unix-like operating system, taking ideas from QNX and Plan 9, available under GPL. (http://chat.net/~jeske/VSTa/). (1999-03-03)