quaternary fission

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• Environmental radioactivity — is produced by radioactive materials in the human environment. While some radioisotopes, such as strontium 90 (90Sr) and technetium 99 (99Tc), are only found on Earth as a result of human activity, and some, like potassium 40 (40K), are only… …   Wikipedia

• ion-exchange reaction — ▪ chemical reaction Introduction       any of a class of chemical reactions between two substances (each consisting of positively and negatively charged species called ions (ion)) that involves an exchange of one or more ionic components.… …   Universalium

• D. P. Agrawal — Shri Dharampal Agrawal Jee with his Best Student Shri Rajiv Dixit Jee This article is about the science and technology historian. For the chairman of the Union Public Service Commission, see D.P. Agrawal (academic). Prof. D. P. Agrawal… …   Wikipedia

• Diatom — For a molecule of two atoms, see Diatomic molecule. Diatoms Marine diatoms Scientific classification Domain …   Wikipedia

• Cosmic ray — For the film, see Cosmic Ray (film). Cosmic radiation redirects here. For some background types of cosmic radiation, see cosmic background radiation and cosmic background. The energy spectrum for cosmic rays Cosmic rays are energetic charged… …   Wikipedia

• Lemuriformes — Pour les articles homonymes, voir Lémurien. Lémuriformes …   Wikipédia en Français

• Binary — means composed of two parts or two pieces . It contrasts with Unary, Ternary, Quaternary, and so on.Binary may also refer to:* Binary option, also known as digital option OR all or nothing option * Binary numeral system, a representation for… …   Wikipedia

• List of Latin words with English derivatives — This is a list of Latin words with derivatives in English (and other modern languages). Ancient orthography did not distinguish between i and j or between u and v. Many modern works distinguish u from v but not i from j. In this article both… …   Wikipedia

• Strontium — (pronEng|ˈstrɒntiəm, ) is a chemical element with the symbol Sr and the atomic number 38. An alkaline earth metal, strontium is a soft silver white or yellowish metallic element that is highly reactive chemically. The metal turns yellow when… …   Wikipedia

• John Dalton — For other people named John Dalton, see John Dalton (disambiguation). John Dalton …   Wikipedia

• Eutrophication — The eutrophication of the Potomac River is evident from its bright green water, caused by a dense bloom of cyanobacteria. Eutrophication (Greek: eutrophia healthy, adequate nutrition, development; German: Eutrophie) or more precisely… …   Wikipedia