Electron

core of the atom; composed of bound nucleons (protons and neutrons)

The positron or antielectron is the particle with an electric charge of +1e, a spin of 1/2 ħ (the same as the electron), and the same mass as an electron. It is the antiparticle (antimatter counterpart) of the electron. When a positron collides with an electron, annihilation occurs. If this collision occurs at low energies, it results in the production of two or more photons.

In physics, an electronvolt (symbol eV), also written as electron-volt and electron volt, is a unit of measurement equivalent to the amount of kinetic energy gained by a single electron accelerating through an electric potential difference of one volt in a vacuum. When used as a unit of energy, the numerical value of 1 eV expressed in unit of joules (symbol J) is equal to the numerical value of the charge of an electron in coulombs (symbol C). Under the 2019 revision of the SI, this sets 1 eV equal to the exact value Historically, the electronvolt was devised as a standard unit of measur

principal energy levels in atomic physics

scientific model of the atom first proposed by J. J. Thomson in 1904

Bending of electron beams due to electrostatic interactions with matter

radioactive decay in which a proton is converted into a neutron while releasing a positron and a neutrino

probability density of electrons being somewhere

secondary electron with enough energy to escape a significant distance away from the primary radiation beam and produce further ionization

physical constant providing length scale to interatomic interactions

a simple model for the behaviour of valence electrons in a crystal structure of a metallic solid

vacuum-tube structure that multiplies incident charges by means of secondary emission

phenomenon where primary incident particles of sufficient energy, when hitting a surface or passing through some material, induce the emission of secondary particles

thumb|right|Cavities and channels in an electride An electride is an ionic compound in which an electron serves the role of the anion. ==Solutions== Solutions of alkali metals in ammonia are electride salts. In the case of sodium, these blue solutions consist of [Na(NH3)6]+ and solvated electrons: Na + 6 NH3 → [Na(NH3)6]+ + e− The cation [Na(NH3)6]+ is an octahedral coordination complex. Despite the name, the electron does not leave the sodium-ammonia complex, but it is transferred from Na to the vacant orbitals of the coordinated ammonia molecules.

probability amplitude in quantum scattering theory

gas ionisation process where free electrons are accelerated by an electric field, collide with gas molecules, and consequently free additional electrons

mass of a stationary electron

mathematical problem

Physics postulate describing all electrons/positrons as one time-independent entity

subatomic phenomenon

one-electron Schrödinger equation of a fictitious system

interaction between electrons, often complicating physical calculations

electrochemical processes involving photons and the emission or absorption of light

physical constant

transfer of a bound electron to a more energetic but still bound state

mechanism of electron transfer in inorganic chemistry