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lone pair
(redirected from electron pair)

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lone pair

In chemistry, a pair of electrons in the outermost shell of an atom that are not used in bonding. In certain circumstances, they will allow the atom to bond with atoms, ions, or molecules (such as boron trifluoride, BF3) that are deficient in electrons, forming coordinate covalent (dative) bonds in which they provide both of the bonding electrons.



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The proper voltage (about 2000 V) is obtained when the magnitude of the number of electron pairs is proportional to the x-ray energy of the incoming photon (just like a Si(Li) detector).
High count rate electron probe microanalysis by Herrington, Charles / Journal of Research of the National Institute of Standards and Technology
The new calculations show in detail what other theorists previously sketched: that magnesium diboride contains two distinct families of electron pairs, one in which the electrons are weakly coupled and one in which they're strongly joined.
Superconductor has odd electron pairing. (Physics) by Science News
Compared with transitions of electron pairs in super-conducting metals, which suddenly fall apart at certain temperatures, the rare earth transitions are "smeared," he says.
Taking temperatures of nuclear transitions by Weiss, P. / Science News
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