atomic scale

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• 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

• Atomic layer deposition — (ALD) is a gas phase chemical process used to create extremely thin coatings. The majority of ALD reactions use two chemicals, typically called s. These precursors react with a surface one at a time in a sequential manner. By exposing the… …   Wikipedia

• atomic force microscope — n an instrument used for mapping the atomic scale topography of a surface by means of the repulsive electronic forces between the surface and the tip of a microscopic probe moving above the surface abbr. AFM …   Medical dictionary

• Atomic clock — Nuclear clock redirects here. For the clock as a measure for risk of catastrophic destruction, see Doomsday Clock. For a clock updated by radio signals (commonly but inaccurately called an atomic clock ), see Radio clock. For the album by Zion I …   Wikipedia

• atomic weight — Chem. the average weight of an atom of an element, formerly based on the weight of one hydrogen atom taken as a unit or on 1/16 the weight of an oxygen atom, but after 1961 based on 1/12 the weight of the carbon 12 atom. Abbr.: at. wt. [1820 30]… …   Universalium

• Atomic Age — This article is about the historical era. For the comic book miniseries, see Atomic Age (comics). An early nuclear power plant that used atomic energy to generate electricity. The Atomic Age, also known as the Atomic Era, is a phrase typically… …   Wikipedia

• Atomic mass — The atomic mass (ma) is the mass of an atom, most often expressed in unified atomic mass units. [GoldBookRef|file=A00496|title=atomic mass] The atomic mass may be considered to be the total mass of protons, neutrons and electrons in a single atom …   Wikipedia

• Atomic bombings of Hiroshima and Nagasaki — Part of the Pacific War, World War II …   Wikipedia

• Atomic mass unit — unified atomic mass unit Unit system: SI recognized unit Unit of... mass Symbol: u Unit conversions 1 u in... is equal to...    dalton …   Wikipedia

• atomic — adj. 1 concerned with or using atomic energy or atomic bombs. 2 of or relating to an atom or atoms. Phrases and idioms: atomic bomb = atom bomb. atomic clock a clock in which the periodic process (time scale) is regulated by the vibrations of an… …   Useful english 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