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When atoms

См. также в других словарях:

  • Manipulation of atoms by optical field — When cold atoms or a Bose Einstein condensate (BEC) of an atomic gas is placed in a light standing wave produced by two counter propagating lasers of certain frequency, the atoms are diffracted in different order. A cold atom absorbs a photon… …   Wikipedia

  • Philadelphia Atoms — Football club infobox | clubname = Philadelphia Atoms fullname = Philadelphia Atoms nickname = Atoms founded = 1973 dissolved = 1976 ground = Veterans Stadium (1973 75) Franklin Field (1976) capacity = chairman = manager = league = North American …   Wikipedia

  • Dwight D. Eisenhower: Atoms for Peace — ▪ Primary Source              President Truman declared that the United States would undertake the development of a hydrogen bomb on January 31, 1950. On April 6, 1952, it was announced that the U.S. was already manufacturing such a bomb; on… …   Universalium

  • octet rule — when atoms combine to form molecules, they tend to share or transfer electrons until eight (four pairs) are in the valence shell of each atom …   Medical dictionary

  • spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …   Universalium

  • Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics       Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity.       Computer scientist Manindra Agrawal of the… …   Universalium

  • chemical bonding — ▪ chemistry Introduction       any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another …   Universalium

  • Electron — For other uses, see Electron (disambiguation). Electron Experiments with a Crookes tube first demonstrated the particle nature of electrons. In this illustration, the profile of the cross shaped target is projected against the tube face at right… …   Wikipedia

  • subatomic particle — or elementary particle Any of various self contained units of matter or energy. Discovery of the electron in 1897 and of the atomic nucleus in 1911 established that the atom is actually a composite of a cloud of electrons surrounding a tiny but… …   Universalium

  • 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

  • hydrogen — /huy dreuh jeuhn/, n. a colorless, odorless, flammable gas that combines chemically with oxygen to form water: the lightest of the known elements. Symbol: H; at. wt.: 1.00797; at. no.: 1; density: 0.0899 g/l at 0°C and 760 mm pressure. [1785 95;… …   Universalium

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