The ancient Greeks noticed that amber attracted small objects when rubbed with fur. Along with lightning, this … See more

In the Standard Model of particle physics, electrons belong to the group of subatomic particles called leptons, which are believed to be fundamental or elementary particles. Electrons have the lowest mass of any charged le… See more

The Big Bang theory is the most widely accepted scientific theory to explain the early stages in the evolution of the Universe. For the first millisecond of the Big Bang, the temperatures were over 10 billion kelvins and … See more

Remote observation of electrons requires detection of their radiated energy. For example, in high-energy environments such as the corona of a star, free electrons form a plasma that radiates energy due to Bremsstrah… See more

Electron beams are used in welding. They allow energy densities up to 10 W·cm across a narrow focus diameter of 0.1–1.3 mm and usually require no filler material. This welding technique must be performed in a vacuu… See more

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1. ^ The positron is occasionally called the 'anti-electron'.
2. ^ The fractional version's denominator is the inverse of the decimal value (along with its relative standard uncertainty of 2.9×10 ). … See more