electron model - définition. Qu'est-ce que electron model
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Qu'est-ce (qui) est electron model - définition

A SIMPLE MODEL FOR THE BEHAVIOUR OF VALENCE ELECTRONS IN A CRYSTAL STRUCTURE OF A METALLIC SOLID
Free-Electron Model of Metals; Free-electron theory of metals; Drude-Sommerfeld model; Drude–Sommerfeld model; Free-electron theory; Free electron theory; Free-electron model
  • In three dimensions, the [[density of states]] of a gas of [[fermion]]s is proportional to the square root of the kinetic energy of the particles.

electron model      
<electronics> A model of semiconductor behaviour in which donors contribute the charge of an electron, and acceptors contribute a space for same, in effect contributing a fictional positive charge of similiar magnitude. Physicists use the electron model. Some language theorists consider language and the electron to be models in themselves. Contrast hole model. (1995-10-06)
Free electron model         
In solid-state physics, the free electron model is a quantum mechanical model for the behaviour of charge carriers in a metallic solid. It was developed in 1927, principally by Arnold Sommerfeld, who combined the classical Drude model with quantum mechanical Fermi–Dirac statistics and hence it is also known as the Drude–Sommerfeld model.
Electron-transferring flavoprotein         
FLAVOPROTEINS THAT SERVE AS SPECIFIC ELECTRON ACCEPTORS FOR A VARIETY OF DEHYDROGENASES
Electron-transferring flavoproteins; Electron transferring flavoprotein; Electron transferring flavoproteins; Electron transfer protein; Electron transfer flavoprotein; Electron-transfer flavoprotein
An electron transfer flavoprotein (ETF) or electron transfer flavoprotein complex (CETF) is a flavoprotein located on the matrix face of the inner mitochondrial membrane and functions as a specific electron acceptor for primary dehydrogenases, transferring the electrons to terminal respiratory systems such as electron-transferring-flavoprotein dehydrogenase. They can be functionally classified into constitutive, "housekeeping" ETFs, mainly involved in the oxidation of fatty acids (Group I), and ETFs produced by some prokaryotes under specific growth conditions, receiving electrons only from the oxidation of specific substrates (Group II).

Wikipédia

Free electron model

In solid-state physics, the free electron model is a quantum mechanical model for the behaviour of charge carriers in a metallic solid. It was developed in 1927, principally by Arnold Sommerfeld, who combined the classical Drude model with quantum mechanical Fermi–Dirac statistics and hence it is also known as the Drude–Sommerfeld model.

Given its simplicity, it is surprisingly successful in explaining many experimental phenomena, especially

  • the Wiedemann–Franz law which relates electrical conductivity and thermal conductivity;
  • the temperature dependence of the electron heat capacity;
  • the shape of the electronic density of states;
  • the range of binding energy values;
  • electrical conductivities;
  • the Seebeck coefficient of the thermoelectric effect;
  • thermal electron emission and field electron emission from bulk metals.

The free electron model solved many of the inconsistencies related to the Drude model and gave insight into several other properties of metals. The free electron model considers that metals are composed of a quantum electron gas where ions play almost no role. The model can be very predictive when applied to alkali and noble metals.