• The atomic units are a system of natural units of measurement that is especially convenient for calculations in atomic physics and related scientific fields...
    25 KB (2,287 words) - 19:27, 2 March 2024
  • The dalton or unified atomic mass unit (symbols: Da or u) is a non-SI unit of mass defined as 1/12 of the mass of an unbound neutral atom of carbon-12...
    34 KB (3,637 words) - 19:08, 10 March 2024
  • In physics, natural units are physical units of measurement in which only universal physical constants are used as defining constants, such that each of...
    20 KB (1,665 words) - 23:09, 27 March 2024
  • Thumbnail for Atomic mass
    The atomic mass (ma or m) is the mass of an atom. Although the SI unit of mass is the kilogram (symbol: kg), atomic mass is often expressed in the non-SI...
    21 KB (2,699 words) - 11:51, 22 March 2024
  • radius. Just as atomic units are given in terms of the atomic mass unit (approximately the proton mass), the physically appropriate unit of length here...
    31 KB (863 words) - 05:30, 24 March 2024
  • Hartree (redirect from Hartree unit)
    hartree (symbol: Eh), also known as the Hartree energy, is the unit of energy in the atomic units system, named after the British physicist Douglas Hartree...
    3 KB (376 words) - 02:34, 28 January 2024
  • A system of units of measurement, also known as a system of units or system of measurement, is a collection of units of measurement and rules relating...
    22 KB (2,454 words) - 22:16, 8 February 2024
  • even after the 2019 redefinition of the SI base units. For a single given sample, the relative atomic mass of a given element is the weighted arithmetic...
    18 KB (2,334 words) - 14:11, 20 February 2024
  • Thumbnail for Atomic clock
    During the 1950s, the National Radio Company sold more than 50 units of the first atomic clock, the Atomichron. In 1964, engineers at Hewlett-Packard released...
    144 KB (15,325 words) - 13:44, 5 March 2024
  • used as a unit of mass. The Hartree (the atomic unit of energy) is commonly used in the field of computational chemistry since such units arise directly...
    7 KB (874 words) - 15:32, 28 March 2024
  • Connerade. p. 339 https://www.phys.ksu.edu/personal/cdlin/class/class11a-amo2/atomic_units.pdf[bare URL PDF] CODATA Value: atomic unit of electric field v t e...
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  • Thumbnail for Mole (unit)
    The mole (symbol mol) is a unit of measurement, the base unit in the International System of Units (SI) for amount of substance, a quantity proportional...
    26 KB (3,292 words) - 12:47, 14 March 2024
  • Thumbnail for Unit of measurement
    use of units of measurement have played a crucial role in human endeavour from early ages up to the present. A multitude of systems of units used to...
    22 KB (2,788 words) - 02:54, 10 March 2024
  • Thumbnail for Tarapur Atomic Power Station
    station built in India. Tarapur Atomic Power Station was constructed initially with two boiling water reactor (BWR) units under the 1963 123 Agreement between...
    10 KB (802 words) - 08:49, 26 February 2024
  • Thumbnail for Atomic number
    The atomic number or nuclear charge number (symbol Z) of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei composed of...
    15 KB (1,866 words) - 20:33, 24 January 2024
  • Thumbnail for Mass number
    nucleons) in an atomic nucleus. It is approximately equal to the atomic (also known as isotopic) mass of the atom expressed in atomic mass units. Since protons...
    8 KB (1,101 words) - 05:21, 3 November 2023
  • Au (redirect from AU (unit))
    Absorbance unit, a reporting unit in spectroscopy Atomic units, a system of units convenient for atomic physics and other fields Ångström unit, a unit of length...
    5 KB (688 words) - 21:21, 15 January 2024
  • Thumbnail for Atomic bombings of Hiroshima and Nagasaki
    On 6 and 9 August 1945, the United States detonated two atomic bombs over the Japanese cities of Hiroshima and Nagasaki. The bombings killed between 129...
    217 KB (24,949 words) - 13:29, 27 March 2024
  • Thumbnail for Coulomb
    Coulomb (redirect from Coulomb (unit))
    units of resistance; the 'volt' is approximately 108 C.G.S. units of electromotive force; and the 'farad' is approximately 1/109 of the C.G.S. unit of...
    8 KB (932 words) - 17:28, 13 March 2024
  • Thumbnail for Unit of length
    are the metric units, used in every country globally. In the United States the U.S. customary units are also in use. British Imperial units are still used...
    13 KB (1,095 words) - 00:02, 4 March 2024
  • relative atomic mass of the electron. mu is defined in terms of Ar(e), and not the other way round, and so the name "electron mass in atomic mass units" for...
    10 KB (1,415 words) - 23:48, 28 November 2023
  • Thumbnail for CPK coloring
    CPK coloring (redirect from Atomic colors)
    stands for Corey-Pauling-Koltun. Walter L. Koltun (1965), Space filling atomic units and connectors for molecular models. U. S. Patent 3170246. Chemical News...
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  • 3.8 introduces atomic units and gives a table of atomic units of various physical quantities and the conversion factor to the SI units. Section 7.3(v)...
    5 KB (741 words) - 22:33, 23 July 2023
  • Thumbnail for Molar mass
    Molar mass (redirect from Gram atomic mass)
    correct: standard relative atomic masses are dimensionless quantities (i.e., pure numbers) whereas molar masses have units (in this case, grams per mole)...
    18 KB (2,742 words) - 15:09, 6 March 2024
  • Thumbnail for Second
    The second (symbol: s) is the unit of time in the International System of Units (SI), historically defined as 1⁄86400 of a day – this factor derived from...
    34 KB (3,637 words) - 11:40, 28 March 2024
  • Bohr magneton (category Atomic physics)
    In atomic physics, the Bohr magneton (symbol μB) is a physical constant and the natural unit for expressing the magnetic moment of an electron caused...
    9 KB (861 words) - 16:53, 4 October 2023
  • Bohr radius (redirect from Bohr (unit))
    The CODATA value of the Bohr radius (in SI units) is 5.29177210903(80)×10−11 m. In the Bohr model for atomic structure, put forward by Niels Bohr in 1913...
    7 KB (954 words) - 02:26, 17 February 2024
  • Thumbnail for Atom
    Atom (redirect from Atomic chemical)
    has an atomic mass of 1 u, a mole of atoms of that element has a mass close to one gram. Because of the definition of the unified atomic mass unit, each...
    121 KB (12,388 words) - 10:29, 27 March 2024
  • Thumbnail for Arbitrary unit
    "arbitrary unit" include: arb. unit, arb. u., AU, and a.u. Among these, "AU" and "a.u." are common abbreviations for astronomical units and atomic units. For...
    6 KB (514 words) - 17:42, 11 March 2024
  • Elementary charge (category Units of electrical charge)
    natural unit systems, such as the system of atomic units, e functions as the unit of electric charge. The use of elementary charge as a unit was promoted...
    22 KB (2,596 words) - 09:51, 4 February 2024