electron

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Related to Electron acceptor: Electron donor

electron

 [e-lek´tron]
any of the negatively charged particles arranged in orbitals around the nucleus of an atom and determining all of the atom's physical and chemical properties except mass and radioactivity. Electrons flowing in a conductor constitute an electric current; when ejected from a radioactive substance, they are beta particles.ƒ

The number of electrons revolving around the nucleus of an atom is equal to its atomic number. An atom of oxygen, for instance, which has an atomic number of 8, has eight electrons in orbit around the nucleus in a manner similar to the planets revolving around the sun in our solar system.

Electrons greatly influence the behavior of an atom toward other atoms. The combination of various elements to form compounds is brought about by the losing or gaining of electrons; the process is sometimes called “sharing” of electrons. For example, the combination of the elements sodium and chlorine produce the compound sodium chloride (table salt). This is accomplished by the transfer of one electron from the outer electron shell of the sodium atom to the outer electron shell of the chlorine atom. This combining of elements by the loss or gain of electrons is called electrovalence.

e·lec·tron (β-),

(ē-lek'tron),
One of the negatively charged subatomic particles that orbit the positive nucleus, in one of several energy levels called shells; in mass they are estimated to be 1/1836.15 of a proton; when emitted from inside the nucleus of a radioactive substance, electrons are called β particles. A nucleus and its electrons constitute an atom.
See also: shell.
[electro- + -on]

electron

/elec·tron/ (e-lek´tron) an elementary particle with the unit quantum of (negative) charge, constituting the negatively charged particles arranged in orbits around the nucleus of an atom and determining all of the atom's physical and chemical properties except mass and radioactivity.electron´ic

electron

[ilek′tron]
Etymology: Gk, elektron, amber
1 a negatively charged elementary particle that has a specific charge, mass, and spin. The number of electrons associated with the nucleus of an atom is equal to the atomic number of the substance.
2 a negative beta particle emitted from a radioactive substance. See also atom, element, ion, neutron, proton.

e·lec·tron

(β-) (ĕ-lek'tron)
One of the negatively charged subatomic particles that are distributed about the positive nucleus and with it constitute the atom; in mass they are estimated to be 1/1836.15 of a proton; when emitted from inside the nucleus of a radioactive substance, electrons are called beta particles.
[electro- + -on]

Electron

One of the small particles that make up an atom. An electron has the same mass and amount of charge as a positron, but the electron has a negative charge.

electron (i·lekˑ·trn),

n the negatively charged particle that orbits around the nucleus of an atom.

e·lec·tron

(ĕ-lek'tron)
Negatively charged subatomic particles that orbit the positive nucleus, in one of several energy levels called shells. A nucleus and its electrons constitute an atom.
[electro- + -on]

electron (e) (ēlek´tron),

n a negatively charged elementary particle constituent in every neutral atom, with a mass of 0.000549. (Particles with an equal but opposite charge are called
positrons.)
electron beam,
n See electron stream.
electron stream,
n (electron beam, cathode ray, cathode stream), a stream of electrons emitted from the negative electrode (cathode) in a roentgen-ray tube; their bombardment of the anode gives rise to the roentgen rays.

electron

any of the negatively charged particles arranged in orbits around the nucleus of an atom and determining all of the atom's physical and chemical properties except mass and radioactivity. Electrons flowing in a conductor constitute an electric current; when ejected from a radioactive substance, they constitute the beta particles.

electron acceptor
see oxidant.
electron beam
the stream of electrons that flows from the anode to the cathode in the x-ray tube and then interacts with the tungsten target to produce x-rays.
electron carrier
a molecule associated with membrane-bound proteins that accepts and transfers electrons.
electron donor
electron micrographs
photographic images of electron microscopic fields.
electron microscope
see electron microscope.
electron microscopy
technology of using an electron microscope.
References in periodicals archive ?
However, the quantum yield of electron transport from QA~ to the intersystem of electron acceptors (cpEo - quantum yield for electron transport -ET) decreased as a function of duration of flooding, especially after the seventh day of flooding.
Fluorescence changes during the fast part (between steps O and P) of the transient can be primarily correlated with the events taking place in the course of successive reduction of the electron acceptors of the entire photosynthetic electron transport chain.
islandicum owns the ability to reduce Fe (III) at 100[degrees]C in a medium with hydrogen as the electron donor and Fe (III)-citrate as the electron acceptor.
Electron All respiring bacteria require a terminal electron acceptor acceptor.
In original photochemical reactions, as the electron donor, the excited RC pigments transfer the electrons to electron acceptor to realize the charge separation and then leave behind "holes".
Changes in the redox state of photosystem II electron acceptors and fluorescence emission from photosystems I and II.
2] to be two orders of magnitude lower when nitrate was the electron acceptor as opposed to C[O.
The incandescent light continues to excite the chlorophyll molecule, but there is no electron acceptor to trap the energy.
Ammonia is the electron donor and nitrite is the electron acceptor.
Following the excitation of ITX and subsequent intersystem crossing to produce the excited stale triplet of ITX, an electron transfer probably occurs from ITX to the electron acceptor, MA.
As the ultimate electron acceptor in cellular metabolism for organisms that use oxygen (i.
Iron in the clays provides the microbes with an electron acceptor for respiration in place of oxygen.