atomic cloud
21Soviet atomic bomb project — The fathers of the Soviet nuclear program, Dr. Andrei Sakharov (left) with Dr. Igor Kurchatov (right) …
22Molecular cloud — See also: Solar nebula Within a few million years the light from bright stars will have boiled away this molecular cloud of gas and dust. The cloud has broken off from the Carina Nebula. Newly formed stars are visible nearby, their images… …
23List of fictional elements, materials, isotopes and atomic particles — This list contains chemical elements, materials, isotopes or (sub)atomic particle that exist primarily in works of fiction (usually fantasy or science fiction). No actual periodic elements end in ite , though many minerals have names with this… …
24Doctor Atomic — John Adams …
25Condensation cloud — A 21 kiloton underwater nuclear weapon test, the Baker shot of Operation Crossroads, showing a Wilson cloud …
26Linear combination of atomic orbitals molecular orbital method — A linear combination of atomic orbitals or LCAO is a quantum superposition of atomic orbitals and a technique for calculating molecular orbitals in quantum chemistry [Huheey, James. Inorganic Chemistry:Principles of Structure and Reactivity ] .… …
27condensation cloud — A mist or fog of minute water droplets that temporarily surrounds the fireball following a nuclear (or atomic) detonation in a comparatively humid atmosphere. The expansion of the air in the negative phase of the blast wave from the explosion… …
28Gilbert U-238 Atomic Energy Laboratory — The Gilbert U 238 Atomic Energy Lab is a toy lab set produced by Alfred Carlton Gilbert and sold between 1950 and 1951. [http://www.americanmemorabilia.com/Auction Item.asp?Auction ID=31568 American Memorabilia] , retrieved December 15, 2006.]… …
29electron cloud — noun A mathematically defined region around an atomic nucleus defined by a high probability that the atoms electrons will be present in that region. Syn: atomic orbital …
30radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …
