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Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. The fission process often produces gamma photons, and releases a very large amount of energy even by the energetic standards of radioactive decay . Nuclear fission was discovered on 19 December 1938 in Berlin by German chemists Otto Hahn and ...
IUPAC definition. chain scission: A chemical reaction resulting in the breaking of skeletal bond. [1] Chain scission is a term used in polymer chemistry describing the degradation of a polymer main chain. [2] It is often caused by thermal stress (heat) or ionizing radiation (e.g. light, UV radiation or gamma radiation ), often involving oxygen ...
Beta scission. Beta scission is an important reaction in the chemistry of thermal cracking of hydrocarbons and the formation of free radicals. Free radicals are formed upon splitting the carbon-carbon bond. Free radicals are extremely reactive and short-lived. When a free radical in a polymer chain undergoes a beta scission, the free radical ...
IUPAC definition for polymer. A polymer (/ ˈ p ɒ l ɪ m ər /) is a substance or material consisting of very large molecules called macromolecules, composed of many repeating subunits. Due to their broad spectrum of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life.
In chemistry, bond cleavage, or bond fission, is the splitting of chemical bonds. This can be generally referred to as dissociation when a molecule is cleaved into two or more fragments. [1] In general, there are two classifications for bond cleavage: homo lytic and hetero lytic, depending on the nature of the process.
Impressionism was a 19th-century art movement characterized by relatively small, thin, yet visible brush strokes, open composition, emphasis on accurate depiction of light in its changing qualities (often accentuating the effects of the passage of time), ordinary subject matter, unusual visual angles, and inclusion of movement as a crucial element of human perception and experience.
e. Nucleon pair breaking in fission has been an important topic in nuclear physics for decades. " Nucleon pair" refers to nucleon pairing effects which strongly influence the nuclear properties of a nuclide . The most measured quantities in research on nuclear fission are the charge and mass fragments yields for uranium-235 and other fissile ...
Homolysis (chemistry) In chemistry, homolysis (from Greek ὅμοιος (homoios) 'equal', and λύσις (lusis) 'loosening') or homolytic fission is the dissociation of a molecular bond by a process where each of the fragments (an atom or molecule) retains one of the originally bonded electrons. During homolytic fission of a neutral molecule ...