uranium-thorium-lead dating — or common lead dating Method of dating very old rocks by means of the amount of common lead they contain. Common lead is any lead from a rock or mineral that contains a large amount of lead and a small amount of the radioactive precursors of lead … Universalium
Dictionary of chemical formulas — This is a list of chemical compounds with chemical formulas and CAS numbers, indexed by formula. This complements alternative listings to be found at list of inorganic compounds, list of organic compounds and inorganic compounds by element. Table … Wikipedia
chemical 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… … Universalium
Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… … Universalium
Die Entdeckung der Kernspaltung — Kaiser Wilhelm Institut für Chemie (heute: Otto Hahn Bau der Freien Universität Berlin) 52.44866613.3429597Koordinaten … Deutsch Wikipedia
Geschichte der Kernspaltung — Kaiser Wilhelm Institut für Chemie (heute: Otto Hahn Bau der Freien Universität Berlin) 52.44866613.3429597Koordinaten … Deutsch Wikipedia
Ore genesis — The various theories of ore genesis explain how the various types of mineral deposits form within the Earth s crust. Ore genesis theories are very dependent on the mineral or commodity. Ore genesis theories generally involve three components:… … Wikipedia
Entdeckung der Kernspaltung — Kernspaltung des Uranatoms: Sonderbriefmarke der Deutschen Bundespost von 1979 … Deutsch Wikipedia
Polonium-210 — Eigenschaften … Deutsch Wikipedia
Polonium 210 — Eigenschaften … Deutsch Wikipedia
