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Root of the word aboriginal. ab ovo: from the egg: i.e., from the beginning or origin. Derived from the longer phrase in Horace's Satire 1.3: "ab ovo usque ad mala", meaning "from the egg to the apples", referring to how Ancient Roman meals would typically begin with an egg dish and end with fruit (cf. the English phrase soup to nuts).
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
Per- and polyfluoroalkyl substances are a group of synthetic organofluorine chemical compounds that have multiple fluorine atoms attached to an alkyl chain. Different organizations use different definitions for PFAS, leading to estimates of between 8,000 and 7 million chemicals within the group.
For the new "element" caloric, both the new and some of the "old" names (igneous fluid and matter of fire and of heat) were coined by Lavoisier, their discoverer. Most element names, however, were not new, so they retained their existing English versions. But their status as elements was new—a product of the chemical revolution.
41 of the 118 known elements have names associated with, or specifically named for, places around the world or among astronomical objects. 32 of these have names tied to the places on Earth, and the other nine are named after to Solar System objects: helium for the Sun; tellurium for the Earth; selenium for the Moon; mercury (indirectly), uranium, neptunium and plutonium after their respective ...
According to Paracelsus and his subsequent followers, there are four categories of elementals, which are gnomes, undines, sylphs, and salamanders. [1] These correspond to the four Empedoclean elements of antiquity: earth, water, air, and fire, respectively. Terms employed for beings associated with alchemical elements vary by source and gloss.
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A total order on a set where every pair of elements is comparable, meaning for any two elements, one is either greater than, less than, or equal to the other. linear ordering Another term for linear order, emphasizing the arrangement of elements in a sequence where each is comparable to the others in a single, unambiguous way. Löb paradox