periodic law — /pear ee od ik, pear /, Chem. 1. the law that the properties of the elements are periodic functions of their atomic numbers. 2. Also called Mendeleev s law. (originally) the statement that the chemical and physical properties of the elements… … Universalium
Periodic trends — In Chemistry, periodic trends are the tendencies of certain elemental characteristics to increase or decrease as one progresses from one corner of the Periodic table of elements.AcidityThe Lewis acidity of each element tends to increase when… … Wikipedia
Periodic acid — Orthoperiodic acid Other names Paraperiodic acid … Wikipedia
periodic acid — noun Etymology: International Scientific Vocabulary per + iodic Date: 1836 any of the strongly oxidizing acids (as H5IO6 or HIO4) that are the most highly oxidized acids of iodine … New Collegiate Dictionary
periodic acid — 1. HIO4, but existing in solution usually in hydrated form; used in carbohydrate detection and analysis. SYN: metaperiodic acid. 2. Any of several iodic(VII) acids formed by the combination of iodine heptoxide, I2O7, with water. * * * per·iod·ic… … Medical dictionary
periodic acid-Schiff reaction — (PAS reaction) a test for the presence of glycoproteins, polysaccharides, certain mucopolysaccharides, glycolipids, and certain fatty acids in tissue sections. The tissue is treated with periodic acid, followed by Schiff s reagent. A positive… … Medical dictionary
periodic acid–Schiff reaction — PAS reaction a test for the presence of glycoproteins, polysaccharides, certain mucopolysaccharides, glycolipids, and certain fatty acids in tissue sections. The tissue is treated with periodic acid, followed by Schiff s reagent. A positive… … The new mediacal dictionary
periodic acid — /perr uy od ik, perr /, Chem. any of a series of acids derived from I2O7 by the addition of water molecules, as HIO4 or H5IO6. [1830 40] * * * … Universalium
periodic acid — per′i•od′ic ac′id [[t]ˈpɜr aɪˈɒd ɪk, ˌpɜr [/t]] n. chem. any of a series of acids derived from I2O7 by the addition of water molecules, as HIO4 or H5IO6 … From formal English to slang
periodic acid — /pɜraɪˌɒdɪk ˈæsəd/ (say perruy.odik asuhd) noun any of a series of acids derived from I2O7 by the addition of n molecules of water, where n has values from 1 to 7. {per + iodic} …