What are valence electrons?

Some articles on electrons, valence electrons, valence:

Core Electron
... Core electrons are the electrons in an atom that are not valence electrons and therefore do not participate in bonding ... example the carbon atom has a total of 6 electrons, 4 of them being valence electrons ... So the remaining 2 electrons must be core electrons ...
Stacking-fault Energy - Influences On Stacking Fault Energy - E/a Ratio
... SFE of a material and is very interrelated with alloy content is the e/a ratio, or the ratio of valence electrons to atoms ... He found that the valence-electron to atom ratio is a good predictor of stacking fault energy, even when the alloying element is changed ... Zinc is a heavier element and only has two valence electrons, whereas aluminum is lighter and has three valence electrons ...
Lewis Structure - Construction - Counting Electrons
... The total number of electrons represented in a Lewis structure is equal to the sum of the numbers of valence electrons on each individual atom ... Non-valence electrons are not represented in Lewis structures ... Once the total number of available electrons has been determined, electrons must be placed into the structure ...
Acceptor (semiconductors)
... For example, when silicon (Si), having four valence electrons, needs to be doped as a p-type semiconductor, elements from group III like boron (B) or aluminium (Al), having three valence electrons, can be used ... When substituting a Si atom in the crystal lattice, the three valence electrons of boron form covalent bonds with three of the Si neighbours but the bond with the fourth neighbour ... The unsatisfied bond attracts electrons from the neighbouring bonds ...

Famous quotes containing the word electrons:

    Such is the art of writing as Dreiser understands it and practices it—an endless piling up of minutiae, an almost ferocious tracking down of ions, electrons and molecules, an unshakable determination to tell it all. One is amazed by the mole-like diligence of the man, and no less by his exasperating disregard for the ease of his readers.
    —H.L. (Henry Lewis)