Atomic Energy Act of 1946 — Full title An Act For the development and control of atomic energy Enacted by the 79th United States Congress Citations Public Law … Wikipedia
Atomic theory — Atomic model redirects here. For the unrelated term in mathematical logic, see Atomic model (mathematical logic). This article is about the historical models of the atom. For a history of the study of how atoms combine to form molecules, see… … Wikipedia
Atomic spectroscopy — is the determination of elemental composition by its electromagnetic or mass spectrum. Atomic spectroscopy is closely related to other forms of spectroscopy. It can be divided by atomization source or by the type of spectroscopy used. In the… … Wikipedia
Atomic Spies — and Atom Spies are terms that refer to various people in the United States, Great Britain, and Canada who are thought to have illicitly given information about nuclear weapons production or design to the Soviet Union during World War II and the… … Wikipedia
Atomic units — (au) form a system of units convenient for atomic physics, electromagnetism, and quantum electrodynamics, especially when the focus is on the properties of electrons. There are two different kinds of atomic units, which one might name Hartree… … Wikipedia
law of octaves — noun see under ↑octave • • • Main Entry: ↑law law of octaves The relationship which arranges the elements in order of atomic weight and in groups of eight, with recurring similarity of properties • • • Main Entry: ↑octave … Useful english dictionary
Law of multiple proportions — In chemistry, the law of multiple proportions is one of the basic laws and a major tool of chemical measurement (stoichiometry). It states that when elements combine they do so in a ratio of small whole numbers. For example, carbon and oxygen… … Wikipedia
Atomic bombings of Hiroshima and Nagasaki — Part of the Pacific War, World War II … Wikipedia
Atomic spectral line — In physics, atomic spectral lines are of two types: * An emission line is formed when an electron makes a transition from a particular discrete energy level of an atom, to a lower energy state, emitting a photon of a particular energy and… … Wikipedia
Atomic absorption spectroscopy — In analytical chemistry, atomic absorption spectroscopy is a technique for determining the concentration of a particular metal element in a sample.cite book |author=Sperling, Michael B.; Welz, Bernhard |title=Atomic Absorption Spectrometry… … Wikipedia
Law of definite proportions — In chemistry, the law of definite proportions, sometimes called Proust s Law, states that a chemical compound always contains exactly the same proportion of elements by mass. An equivalent statement is the law of constant composition, which… … Wikipedia