A chain reaction is a sequence of reactions where a reactive product or by-product causes additional reactions to take place. It is a self-amplifying chain of events. A chain of events is a number of actions and their effects that are Contiguous and linked together

• The neutron-fission chain reaction: a neutron plus a fissionable atom causes a fission resulting in a larger number of neutrons than was consumed in the initial reaction. This article is a discussion of neutrons in general For the specific case of a neutron found outside the nucleus see Free neutron. Nuclear fission is the splitting of the nucleus of an atom into parts (lighter nuclei) often producing Free neutrons and other smaller nuclei which may A nuclear chain reaction occurs when one Nuclear reaction causes an average of one or more nuclear reactions thus leading to a self-propagating number of these reactions History See also Atomic theory, Atomism The concept that matter is composed of discrete units and cannot be divided into arbitrarily tiny
• Chemical reactions, where a product of a reaction is itself a reactive particle which can cause more similar reactions. A chemical reaction is a process that always results in the interconversion of Chemical substances The substance or substances initially involved in a chemical reaction are called For example, every step of H₂ + Cl₂ chain reaction consumes one molecule of H₂ or Cl₂, one free radical H· or Cl· producing one HCl molecule and another free radical. Hydrogen (ˈhaɪdrədʒən is the Chemical element with Atomic number 1 Chlorine (ˈklɔriːn from the Greek word 'χλωρóς' ( khlôros, meaning 'pale green' is the Chemical element with Atomic number 17 and In Chemistry, a molecule is defined as a sufficiently stable electrically neutral group of at least two Atoms in a definite arrangement held together by In Chemistry, radicals (often referred to as free radicals) are atoms molecules or ions with Unpaired electrons on an otherwise Open shell Hydrochloric acid is the Solution of Hydrogen chloride ( H[[Chlorine Cl]] in water
• Electron avalanche process: Collisions of free electrons in a strong electric field forming "new" electrons to undergo the same process in successive cycles. An electron avalanche is a process in which a number of Free electrons in a medium (usually a Gas) are subjected to strong acceleration by an Electric In Solid-state physics, the free electron model is a simple model for the behaviour of Valence electrons in a Crystal structure of a Metallic In Physics, the space surrounding an Electric charge or in the presence of a time-varying Magnetic field has a property called an electric field (that can
• In linguistics, language change is seen as the gradual outcome of chain reactions and subject to cyclic drift. Linguistics is the scientific study of Language, encompassing a number of sub-fields Language change is the manner in which the phonetic, morphological, semantic, syntactic, and other features of a language are modified over time There are two types of Linguistic drift, a Unidirectional Short-term and Cyclic Long-term drift Short-term unidirectional ^[1]

Notes

1. ^ Henri Wittmann (1983). Henri Wittmann (born 1937 is a Canadian linguist from Quebec. "Les réactions en chaîne en morphologie diachronique. " Actes du Colloque de la Société internationale de linguistique fonctionnelle 10. 285-92. [1]

See also

• Nuclear chain reaction
• Polymerase chain reaction
• Markov chain
• Rube Goldberg machine
• Causality
• Butterfly effect
• Thermal runaway