deuterium nucleus
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Deuterium burning — is a nuclear fusion reaction that occurs in stars and some substellar objects, in which a deuterium nucleus and a proton combine to form a helium 3 nucleus. It occurs as the second stage of the proton–proton chain reaction, in which a deuterium… … Wikipedia
Deuterium — Hydrogen 2 Full table General Name, symbol deuterium, 2H or D Neutrons 1 … Wikipedia
deuterium — /dooh tear ee euhm, dyooh /, n. Chem. an isotope of hydrogen, having twice the mass of ordinary hydrogen; heavy hydrogen. Symbol: D; at. wt.: 2.01; at. no.: 1. [1933; < Gk deúter(os) second (see DEUTERO ) + IUM] * * * or heavy hydrogen Isotope of … Universalium
deuterium — noun Etymology: New Latin, from Greek deuteros second Date: 1933 an isotope of hydrogen that has one proton and one neutron in its nucleus and that has twice the mass of ordinary hydrogen symbol D; called also heavy hydrogen … New Collegiate Dictionary
deuterium — SYN: hydrogen 2. [G. deuteros, second] d. oxide SYN: heavy water. * * * deu·te·ri·um d(y)ü tir ē əm n an isotope of hydrogen that has one proton and one neutron in its nucleus and that has twice the mass of ordinary hydrogen called also heavy… … Medical dictionary
Atomic nucleus — A figurative depiction of the helium 4 atom with the electron cloud in shades of gray. In the nucleus, the two protons and two neutrons are depicted in red and blue. This depiction shows the particles as separate, whereas in an actual helium atom … Wikipedia
isotope — isotopic /uy seuh top ik/, adj. isotopically, adv. /uy seuh tohp /, n. Chem. any of two or more forms of a chemical element, having the same number of protons in the nucleus, or the same atomic number, but having different numbers of neutrons in… … Universalium
nuclear fusion — fusion (def. 4). [1895 1900] * * * Process by which nuclear reactions between light elements form heavier ones, releasing huge amounts of energy. In 1939 Hans Bethe suggested that the energy output of the sun and other stars is a result of fusion … Universalium
cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… … Universalium
Isotopes of hydrogen — Hydrogen (H) (Standard atomic mass: 1.00794(7) u) has three naturally occurring isotopes, denoted 1H, 2H, and 3H. Other, highly unstable nuclei (4H to 7H) have been synthesized in the laboratory but not observed in nature.Gurov YB, Aleshkin DV,… … Wikipedia
chemistry — /kem euh stree/, n., pl. chemistries. 1. the science that deals with the composition and properties of substances and various elementary forms of matter. Cf. element (def. 2). 2. chemical properties, reactions, phenomena, etc.: the chemistry of… … Universalium
