pairing of electrons

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• Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …   Universalium

• Ligand field theory — (LFT) describes the bonding in coordination complexes. [Schläfer, H. L.; Gliemann, G. Basic Principles of Ligand Field Theory Wiley Interscience: New York; 1969] It represents an application of molecular orbital theory to transition metal… …   Wikipedia

• Spectrochemical series — A spectrochemical series is a list of ligands ordered on ligand strength and a list of metal ions based on oxidation number, group and its identity. In crystal field theory, ligands modify the difference in energy between the d orbitals (Δ)… …   Wikipedia

• Nitrogen — carbon ← nitrogen → oxygen ↑ N ↓ P …   Wikipedia

• Superinsulator — A superinsulator is a material that at low temperatures under certain conditions has an infinite resistance and no current will pass through it. The superinsulating state is has many parallels to the superconducting state, and can be destroyed… …   Wikipedia

• Nina Byers — (born January 19, 1930)[1] is a theoretical physicist, Research Professor and Professor of Physics emeritus in the Department of Physics and Astronomy, UCLA. Scientific contributions have mainly been in particle physics and the theory of… …   Wikipedia

• unpaired — un·paired .ən pa(ə)rd, pe(ə)rd adj 1 a) not paired esp not matched or mated b) characterized by the absence of pairing <electrons in the unpaired state> 2) situated in the median plane of the body <an unpaired anatomical part> also… …   Medical dictionary

• chemical bonding — ▪ chemistry Introduction       any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another …   Universalium

• High-temperature superconductivity — Unsolved problems in physics What causes superconductivity at temperatures above 50 kelvin? High temperature superconductors (abbreviated high Tc or HTS) are materials that have a superconducting transition temperature (Tc) above 30 K… …   Wikipedia

• Cooper pair — In condensed matter physics, a Cooper pair or BCS pair is two electrons (or other fermions) that are bound together at low temperatures in a certain manner first described in 1956 by American physicist Leon Cooper.[1] Cooper showed that an… …   Wikipedia

• Nuclear structure — Physics portal This page is an adapted translation of the corresponding fr:Structure nucléaire As will be noted, there remain void paragraphs, as on the original (which provides no sources). Competent Wikipedians are welcom …   Wikipedia