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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 ...
A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
atomic number (Z) The number of protons found in the nucleus of an atom. It is most often used to classify elements within the periodic table. atomic orbital atomic packing factor atomic physics A branch of physics that studies atoms as isolated systems of electrons and an atomic nucleus. Compare nuclear physics. atomic structure atomic weight (A)
row of the periodic table: punctuation mark used at the end of a sentence (interj.) used at the end of a statement to emphasise its finality *("You are not going to that concert, period!") (UK: full stop for both senses) pinafore A sleeveless, collarless dress worn over a shirt (Jumper (dress)) A style of apron pint
Main list: Lists of English words Quebec French • Language teaching terms and ideas • Rhetorical terms • Alternative words for British • Greek words for love • Case-sensitive English words • Chicano Caló words and expressions • Dacian words • English words containing Q not followed by U • English words with disputed usage • French words of Arabic origin • Frequently ...
Note that some words contain an ae which may not be written æ because the etymology is not from the Greek -αι-or Latin -ae-diphthongs. These include: In instances of aer (starting or within a word) when it makes the sound IPA [ɛə]/[eə] (air). Comes from the Latin āër, Greek ἀήρ. When ae makes the diphthong / eɪ / (lay) or / aɪ ...
Relative density, or specific gravity, [141] [142] is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water at its densest (at 4 °C or 39.2 °F); for gases, the reference is air at room temperature (20 °C or 68 ...
3' untranslated region (3'-UTR). Also three-prime untranslated region, 3' non-translated region (3'-NTR), and trailer sequence.. 3'-end. Also three-prime end.. One of two ends of a single linear strand of DNA or RNA, specifically the end at which the chain of nucleotides terminates at the third carbon atom in the furanose ring of deoxyribose or ribose (i.e. the terminus at which the 3' carbon ...