lithium-cooled reactor
21Curium — This article is about the chemical element. For the ancient city located in Cyprus, see Kourion. americium ← curium → berkelium …
22Mathematics 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… …
23Sodium — This article is about the chemical element. For the PlayStation Home game, see Sodium (PlayStation Home). neon ← sodium → magnesium Li ↑ Na ↓ K …
24Nuclear transmutation — is the conversion of one chemical element or isotope into another. In other words, atoms of one element can be changed into atoms of other element by transmutation . This occurs either through nuclear reactions (in which an outside particle… …
25Nuclear power — Atomic Power redirects here. For the film, see Atomic Power (film). This article is about the power source. For nation states that are nuclear powers, see List of states with nuclear weapons …
26petroleum refining — Introduction conversion of crude oil into useful products. History Distillation of kerosene and naphtha The refining of crude petroleum owes its origin to the successful drilling of the first oil well in Titusville, Pa., in 1859. Prior to… …
27rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 …
28Atomic 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 …
29Nuclear weapon yield — Logarithmic scatterplot comparing the yield (in kilotons) and weight (in kilograms) of all nuclear weapons developed by the United States. The explosive yield of a nuclear weapon is the amount of energy discharged when a nuclear weapon is… …
30Carbon nanotube — Not to be confused with Carbon fiber. Part of a series of articles on Nanomaterials Fullerenes …
