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Electron The least massive electrically-charged particle, hence absolutely stable. It is the most common lepton, with electric charge -1. A unit of energy equal to the kinetic energy acquired by an electron or proton falling through an electric potential difference of 1 volt.
- Electrons surround the atom's positively charged nucleus and determine the atom's chemical properties.
- Electric Field
- In an electric field the force on an electron is given by:
- F = eE
- where
- F = force [N]
- e = electron charge [C]
- E = electric field intensity [Vm-1]
Magnetic Field - An electron moving with velocity v at right angles to a magnetic field of magnetic flux density B experiences a force F given by:
- F = Bev
- where
- F = force [N]
- B = magnetic flux density [weberm-2]
- e = electron charge [C]
- v = velocity [ms-1]
Click on an item to paste into clipboard or use clipboard symbol at end to clipboard all values | electron mass | 9.10938188e-31 | kg | Clip | | electron charge | 1.602176462e-19 | C | Clip | | electron-muon mass ratio | 4.83633210e-3 | | Clip | | electron-tau mass ratio | 2.87555e-4 | | Clip | | electron-proton mass ratio | 5.446170232e-4 | | Clip | | electron-neutron mass ratio | 5.438673462e-4 | | Clip | | electron-deuteron mass ratio | 2.7244371170e-4 | | Clip | | electron-alpha particle mass ratio | 1.3709335611e-4 | | Clip | | electron charge to mass quotient | 1.758820174e11 | Ckg-1 | Clip | | electron molar mass | 5.485799110e-7 | kgmol-1 | Clip | | Compton wavelength | 2.426310215e-12 | m | Clip | | classical electron radius | 2.817940285e-15 | m | Clip | | Thomson cross-section | 0.665245854e-28 | m2 | Clip | | electron magnetic moment | -928.476362e-26 | JT-1 | Clip | | electron magnetic moment anomaly | 1.1596521869e-3 | | Clip | | electron g-factor | -2.0023193043737 | | Clip | | electron-muon magnetic moment ratio | 206.7669720 | | Clip | | electron-proton magnetic moment ratio | -658.2106875 | | Clip | | electron-neutron magnetic moment ratio | 960.92050 | | Clip | | electron-deuteron magnetic moment ratio | -2143.923498 | | Clip | | electron gyromagnetic ratio | 1.760859794e11 | s-1T-1 | Clip |
 paste all data into clipboard Historical Notes - 1897 Electron discovered by Sir Joseph Thomson.
- 1899 Sir Joseph Thomson measures the charge on the electron, and proves that it carries the same amount of charge as the hydrogen ions in electrolysis.
- 1900 Paul Karl Ludwig Drude shows that moving electrons conduct electricity in metals.
- 1925 Pauli proposed the Exclusion Principle, no two electrons in an atom can have the same set of quantum numbers.
- 1927 Experiment by Davisson and Germer, and simultaneous experiment by G. P. Thompson, proved the wave behaviour of electrons.
- 1933 Electron microscope invented by Ernst Ruska.
See also: Atomic Orbital, Atomic Particle, Beta Particle, Electron Affinity, Electron Capture, Electron Flow, Electron-Positron Annihilation, Electrophile, Exclusion Principle, Hunds Rule, Landau Damping, Lepton, Millikan Oil Drop Experiment, Muon, Neutrino, Neutron, Particle Accelerator, Physical Constants, Positron, Proton, Thomson Cross Section, Thomson, Sir Joseph John, Valence Electrons, Wave Particle Duality, Wobble Frequency, Zero-Point Pressure.
  
Subjects:- Physics
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