cesium nitrate
11environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …
12sodium — /soh dee euhm/, n. 1. Chem. a soft, silver white, metallic element that oxidizes rapidly in moist air, occurring in nature only in the combined state, and used in the synthesis of sodium peroxide, sodium cyanide, and tetraethyllead: a necessary… …
13ARGENT — L’argent, élément chimique de symbole Ag et de numéro atomique 47, est l’un des métaux les plus anciennement connus. Il semble cependant que sa découverte soit postérieure à celle des deux autres métaux de la même famille chimique: l’or et le… …
14Strontium — Rubidium ← Strontium → Yttrium Ca …
15Cycle du combustible nucléaire en France — Le cycle du combustible nucléaire en France, est l ensemble des opérations destinées à fournir du combustible aux réacteurs nucléaires français puis à gérer le combustible irradié. Ces opérations compennent : l extraction du minerai, la… …
16alkali metal — Chem. any of the group of univalent metals including potassium, sodium, lithium, rubidium, cesium, and francium, whose hydroxides are alkalis. [1880 85] * * * Any of the six chemical elements in the leftmost group of the periodic table (lithium,… …
17iodine — /uy euh duyn , din/; in Chem. also /uy euh deen /, n. Chem. a nonmetallic halogen element occurring at ordinary temperatures as a grayish black crystalline solid that sublimes to a dense violet vapor when heated: used in medicine as an antiseptic …
18potassium — /peuh tas ee euhm/, n. Chem. a silvery white metallic element that oxidizes rapidly in the air and whose compounds are used as fertilizer and in special hard glasses. Symbol: K; at. wt.: 39.102; at. no.: 19; sp. gr.: 0.86 at 20°C. [1800 10; < NL; …
19chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… …
20oxyacid — /ok see as id/, n. Chem. an inorganic acid containing oxygen. Also called oxygen acid. [1830 40; OXY 2 + ACID] * * * ▪ chemical compound Introduction any oxygen containing acid. Most covalent nonmetallic oxides (oxide) react with water to… …
