radium hydroxide
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Radium — (pronEng|ˈreɪdiəm) is a radioactive chemical element which has the symbol Ra and atomic number 88. Its appearance is almost pure white, but it readily oxidizes on exposure to air, turning black. Radium is an alkaline earth metal that is found in… … Wikipedia
radium — /ray dee euhm/, n. 1. Chem. a highly radioactive metallic element whose decay yields radon gas and alpha rays. Symbol: Ra; at. wt.: 226; at. no.: 88. 2. a lustrous rayon or silk fabric constructed in plain weave and used in women s apparel,… … Universalium
Actinide — The atomic bomb dropped on Nagasaki had a plutonium charge.[1] The actinide or actinoid (IUPAC nomenclature) series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium thro … Wikipedia
2. Hauptgruppe — … Deutsch Wikipedia
Erdalkali — … Deutsch Wikipedia
Erdalkalimetall — … Deutsch Wikipedia
Gruppe-2-Element — … Deutsch Wikipedia
Zweite Hauptgruppe — … Deutsch Wikipedia
Uraninit — (Größe: 4 x 2,4 x 2,1 cm) aus der Chestnut Flats Mine bei Spruce Pine, Mitchell County, North Carolina, USA Andere Namen Pechblende Uranpecherz Uranit Uranin Chemische Formel UO2 … Deutsch Wikipedia
Water purification — This article is about large scale, municipal water purification. For portable/emergency water purification, see portable water purification. For industrial water purification, see deionized water. For distilled water, see distilled water. Water… … Wikipedia
