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System of measurement
The atomic units are a system of natural units of measurement that is especially convenient for calculations in atomic physics and related scientific fields
Atomic_units
Standard unit of mass for atomic-scale entities
The dalton (symbol: Da), or unified atomic mass unit (symbol: u), is a unit of mass defined as 1/12 of the mass of an unbound neutral atom of carbon-12
Dalton_(unit)
Units of measurement based on universal physical constants
Constants, Units, and Uncertainty. NIST. Retrieved 2023-12-31. "2018 CODATA Value: atomic unit of time". The NIST Reference on Constants, Units, and Uncertainty
Natural_units
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
Atomic radii of the elements (data page)
Atomic_radii_of_the_elements_(data_page)
Rest mass of an atom in its ground state
isotope can differ from the relative atomic mass, atomic weight, or standard atomic weight, by several mass units. Relative isotopic masses are always
Atomic_mass
Collection of units of measurement and rules relating them to each other
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
System of units of measurement
System_of_units_of_measurement
Atoms. By J. P. Connerade. p. 339 "Atomic units" (PDF). Archived from the original (PDF) on 2021-11-28. CODATA Value: atomic unit of electric field v t e
Ponderomotive_energy
Measurement unit for time
All of the formal units of time are scaled multiples of each other. The most common units are the second, defined in terms of an atomic process; the day
Unit_of_time
Unit of energy in the atomic units system
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
Hartree
Number of protons found in the nucleus of an atom
The atomic number or nuclear charge number (symbol Z, from the German Zahl, "number") of a chemical element is the charge number of its atomic nucleus
Atomic_number
Quantity standard
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
Unit_of_measurement
First nuclear power station built in India
and the International Atomic Energy Agency (IAEA). It was built for the Department of Atomic Energy by GE and Bechtel. Units 1 and 2 were brought online
Tarapur_Atomic_Power_Station
Terms and symbols widely used in the field of physical chemistry
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)
Quantities, Units and Symbols in Physical Chemistry
Quantities,_Units_and_Symbols_in_Physical_Chemistry
Clock that monitors the resonant frequency of atoms
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
Atomic_clock
Units used to measure energy
energy has the same units as momentum, mass, and inverse length, all of which are measured in eV. The Hartree (the atomic unit of energy) is commonly
Units_of_energy
Reference value 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
Unit_of_length
SI unit of amount of substance
The mole (symbol mol) is a unit of measurement, the base unit in the International System of Units (SI) for amount of substance. One mole is an aggregate
Mole_(unit)
Topics referred to by the same term
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
Au
SI unit of time
and only two of the 22 named derived units, radian and steradian, do not depend on the second either. A set of atomic clocks throughout the world keeps time
Second
Concept in condensed matter physics
atomic units containing one electron. That is, if n {\displaystyle n} is the number of electrons in a unit volume using atomic units where the unit of
Thomas–Fermi_screening
Type of atomic measurement
Relative atomic mass (symbol: Ar; sometimes abbreviated RAM or r.a.m.), also known by the deprecated synonym atomic weight, is a dimensionless physical
Relative_atomic_mass
1945 attacks in Japan during WWII
developing an atomic bomb. In 1945, the Pacific War between the Empire of Japan and the Allies entered its fourth year. Most Japanese military units fought fiercely
Atomic bombings of Hiroshima and Nagasaki
Atomic_bombings_of_Hiroshima_and_Nagasaki
Physical constant relating particle kinetic energy with temperature
have exact finite decimal values in SI units. They are used in various combinations to define the seven SI base units. The Boltzmann constant is defined to
Boltzmann_constant
Unit of magnetic moment
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
Bohr_magneton
SI derived unit of electric charge
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
Coulomb
Unit of length about the size of a hydrogen atom
reduced mass, as mentioned above). As such, it became the unit of length in the system of atomic units. In Schrödinger's quantum-mechanical theory of the hydrogen
Bohr_radius
Charge carried by one proton or electron
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
Elementary_charge
changeset. Because version control systems operate on changesets as atomic units, and because communication within development teams improves performance
Changeset
Unit of length
which adopted the unit and named it after him.[citation needed] It subsequently spread to the fields of astronomical spectroscopy, atomic spectroscopy, and
Angstrom
respectively. The Panchayati Raj has a three-tier structure in the state. The atomic unit is called a Gram Panchayat, which is the Panchayat organisation for a
Districts_of_West_Bengal
Mass per amount of substance
correct: relative atomic masses and standard atomic weights are dimensionless quantities (i.e., pure numbers), whereas molar masses have units (in this case
Molar_mass
Colour convention for differentiating atoms
Corey-Pauling-Koltun. US Patent 3170246, Walter L. Koltun, "Space filling atomic units and connectors for molecular models", issued 1965-02-23 Helmenstine
CPK_coloring
Universal and unchanging physical quantity
Planck units, constructed from c, G, ħ, and kB give conveniently sized measurement units for use in studies of quantum gravity, and atomic units, constructed
Physical_constant
Mass of a stationary electron
about 9.109×10−31 kilograms or about 5.486×10−4 daltons i.e. unified atomic mass units (u), which has an energy-equivalent of about 8.187×10−14 joules or
Electron_mass
Smallest unit of a chemical element
evidence that matter really is composed of discrete units, and so applied the word atom to those units. The basic idea that matter is made up of tiny indivisible
Atom
CGS unit of electric dipole moment
is still used in atomic physics and chemistry because SI units have until recently been inconveniently large. The smallest SI unit of electric dipole
Debye
Relative unit of measurement
"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
Arbitrary_unit
unit is commonly known by another name (for example, 1 micron = 10−6 metre). Within each table, the units are listed alphabetically, and the SI units
List_of_conversion_factors
Approximations in density functional theory
\mathrm {d} \mathbf {r} \,,} where the second formulation applies in atomic units. Analytic expressions for the correlation energy of the HEG are available
Local-density_approximation
Average distance between two nuclei of chemically bonded atoms
covalent bonds. Since one atomic unit of length (i.e., a Bohr radius) is 52.9177 pm, the C–C bond length is 2.91 atomic units, or approximately three Bohr
Bond_length
Type of system of units of measurement
of its derived units. A coherent derived unit is a derived unit that, for a given system of quantities and a chosen set of base units, is a product of
Coherence (units of measurement)
Coherence_(units_of_measurement)
Particle smaller than an atom
two down quarks and one up quark. These commonly bind together into an atomic nucleus, e.g. a helium-4 nucleus is composed of two protons and two neutrons
Subatomic_particle
Indian Nuclear power plant
The Rajasthan Atomic Power Station (RAPS; also, Rajasthan Atomic Power Project - RAPP) is a nuclear power plant located at Rawatbhata in the state of Rajasthan
Rajasthan Atomic Power Station
Rajasthan_Atomic_Power_Station
Indian nuclear power plant
four units. The fourth unit went critical on 27 November 2010. The two oldest units comprise the west half of the site and the two newer units are adjoining
Kaiga_Atomic_Power_Station
Atomic theory is the scientific theory that matter is composed of particles called atoms. The definition of the word "atom" has changed over the years
History_of_atomic_theory
Singular episode of social interaction
continuous goal or purpose. This conceptualization views a social event as an atomic unit of social interaction. For example, if a father and a child are coloring
Social_event
Nuclear power plant in Pennsylvania
Bottom Unit 1 in 1958. The U.S.'s first nuclear power plant (the Shippingport Atomic Power Station) had gone on-line a year earlier. Peach Bottom Unit 1 was
Peach Bottom Nuclear Generating Station
Peach_Bottom_Nuclear_Generating_Station
Measure of the size of an atom
The atomic radius of a chemical element is a measure of the size of its atom, usually the mean or typical distance from the center of the nucleus to the
Atomic_radius
In logic, a statement which is always true
substitution. Propositional logic begins with propositional variables, atomic units that represent concrete propositions. A formula consists of propositional
Tautology_(logic)
Dimensionless number that quantifies the strength of the electromagnetic interaction
\;}}\approx } 0.30282212 in terms of such a natural unit of charge. In the system of atomic units, which sets e = ℏ = 4 π ε 0 = 1 {\displaystyle e=\hbar
Fine-structure_constant
One quintillionth of a second
An attosecond (abbreviated as as) is a unit of time in the International System of Units (SI) equal to 10−18 or 1⁄1 000 000 000 000 000 000 (one quintillionth)
Attosecond
Quantum mechanical phenomenon
prominently in low-mass particles such as electrons tunnelling through atomically narrow barriers. However tunnelling has been observed with protons and
Quantum_tunnelling
Variant of the centimetre–gram–second unit system
and Heaviside–Lorentz units. Some other unit systems are called "natural units", a category that includes atomic units, Planck units, and others. The International
Gaussian_units
Semantic representation of data
In metadata, the term data element is an atomic unit of data that has precise meaning or precise semantics. Data elements usage can be discovered by inspection
Data_element
Tabular arrangement of the chemical elements
law, which states that when the elements are arranged in order of their atomic numbers an approximate recurrence of their properties is evident. The table
Periodic_table
Modern form of the metric system
comprises a coherent system of units of measurement starting with seven base units, which are the second (symbol: s, the unit of time), metre (m, length)
International_System_of_Units
Theory in linguistics
divided into smaller, meaningful units, known as immediate constituents, which are further broken down until the atomic units are uncovered, like individual
Immediate constituent analysis
Immediate_constituent_analysis
Order of bytes in a computer word
sequence of storage cells (smallest addressable units); in machines that support byte addressing, those units are called bytes. Each byte is identified and
Endianness
Topics referred to by the same term
measurement of viruses or bacteria Hartree, an atomic unit of energy Hectare (ha), a unit of area Hectoampere, a unit of electric current ha (function prefix)
Ha
Software
keying is employed; unlike the other modes, messages are transmitted as atomic units after being compressed and then encoded with a process known as forward
WSJT_(amateur_radio_software)
Unit of mass
more formally correct "milli unified atomic mass unit" (mu) and equivalent to 1/1000 of the unified atomic mass unit (u). A more modern name is the millidalton
Milli_mass_unit
Type of speech act
natural language understanding, a dialog act can be interpreted as the atomic units of a conversation, more fine-grained than utterances, characterized by
Dialog_act
Mystical properties of numbers
refer to such quantities as the ratio of the age of the universe to the atomic unit of time, the number of electrons in the universe, and the difference
Numerology
1911 theoretical description of an atom
central charge of an atom might be "proportional" to its atomic mass in hydrogen mass units (approximately one dalton) (roughly 1/2 of it, in Rutherford's
Rutherford_model
Hypothesis relating age of the universe to physical constants
the permittivity factor 4 π ϵ 0 {\displaystyle 4\pi \epsilon _{0}} in atomic units (equal to 1), the value of the gravitational constant is approximately
Dirac large numbers hypothesis
Dirac_large_numbers_hypothesis
Molecular ion
distances between the electron and the nuclei are denoted ra and rb. In atomic units (ħ = m = e = 4πε0 = 1) the wave equation is ( − 1 2 ∇ 2 + V ) ψ = E ψ
Dihydrogen_cation
Approximation method in quantum physics
principal quantum number n is given in atomic units as E = − 1 / n 2 {\displaystyle E=-1/n^{2}} . It was observed from atomic spectra that the energy levels of
Hartree–Fock_method
SI unit of frequency
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), often described as being equivalent to one event (or cycle)
Hertz
First modern model of the atom
Thomson's model was the first atomic model to describe an internal structure. Before this, atoms were simply the basic units of weight by which the chemical
Plum_pudding_model
2011 nuclear accident in Japan
is regarded by the United Nations Scientific Committee on the Effects of Atomic Radiation as the worst nuclear incident since the Chernobyl disaster. According
Fukushima_nuclear_accident
Conversion constant for amount of substance
S2CID 242934226. de Bievre, P.; Peiser, H. S. (1992). "Atomic Weight: The Name, Its History, Definition and Units". Pure and Applied Chemistry. 64 (10): 1535–1543
Avogadro_constant
Length used in relativistic quantum physics
10^{4}~{\textrm {fm}}} The angular wavenumber of a photon with one hartree (the atomic unit of energy E h = 4 π ℏ c R ∞ {\displaystyle E_{\text{h}}=4\pi \hbar
Compton_wavelength
Mathematical function used to approximate atomic orbitals in quantum chemistry
functions and are referred to as hydrogen-like atomic orbitals. The electronic Hamiltonian (in atomic units) of a Hydrogenic system is given by H ^ e = −
1s_Slater-type_function
Field of physics that studies the atom
Atomic physics is the field of physics that studies atoms as an isolated system of electrons and an atomic nucleus. Atomic physics typically refers to
Atomic_physics
Devices generating electricity from radioisotope decay
An atomic battery, nuclear battery, radioisotope battery, or radioisotope generator uses energy from the decay of a radioactive isotope to generate electric
Atomic_battery
specifically ring theory, an atomic domain or factorization domain is an integral domain in which every non-zero non-unit can be written in at least one
Atomic_domain
Function describing an electron in an atom
In quantum mechanics, an atomic orbital is a function describing the location and wave-like behavior of an electron in an atom. This function describes
Atomic_orbital
International organisation
York Geneva Seibersdorf Monaco Toronto Tokyo Trieste The International Atomic Energy Agency (IAEA) is an intergovernmental organization that seeks to
International Atomic Energy Agency
International_Atomic_Energy_Agency
1990 video game
Atomic Punk, released in Japan as Bomber Boy (ボンバーボーイ, Bonbā Bōi) and in Europe as Dynablaster, is a video game released for the Game Boy in 1990 by Hudson
Atomic_Punk
Man-portable nuclear weapons
Special Atomic Demolition Munition (SADM), also known as the XM129 and XM159 Atomic Demolition Charges, and the B54 bomb was a nuclear man-portable atomic demolition
Special Atomic Demolition Munition
Special_Atomic_Demolition_Munition
American company
of typically 100 to 300 angstroms (or approximately 20 to 60 silicon atomic unit cells) thick which is a reengineered silicon. In 2018, Atomera Licensed
Atomera
One of the seven units of measurement that define the metric system
The SI base units are the standard units of measurement defined by the International System of Units (SI) for the seven base quantities of what is now
SI_base_unit
Units defined only by physical constants
In particle physics and physical cosmology, Planck units are a system of units of measurement defined exclusively in terms of four universal physical
Planck_units
Non-SI unit of radioactivity
convert between years and other units of time, not the Gregorian year. The relationship between years and other time units in NUBASE2020 is as follows: 1
Curie_(unit)
Research unit of the Government of India
Atomic Minerals Directorate for Exploration and Research (AMD), with headquarters at Hyderabad and seven regional centers, is the oldest unit of the Department
Atomic Minerals Directorate for Exploration and Research
Atomic_Minerals_Directorate_for_Exploration_and_Research
World War II Allied nuclear weapons program
The design called for five first-stage processing units, known as Alpha racetracks, and two units for final processing, known as Beta racetracks. In
Manhattan_Project
power-generating unit in India (1000 MWe). After the successful commissioning of Kudankulam units 1 & 2, an agreement was made with Russia in June 2017 for units 5 &
Nuclear_power_in_India
Number of heavy particles in the atomic nucleus
mass number (symbol A, from the German word: Atomgewicht, "atomic weight"), also called atomic mass number or nucleon number, is the total number of protons
Mass_number
Computational quantum mechanical modelling method to investigate electronic structure
moving in the Coulomb potential can be chosen in the following form (atomic units are used): H = c ( α ⋅ p ) + e V + m c 2 β , {\displaystyle H=c({\boldsymbol
Density_functional_theory
Relative atomic mass as defined by IUPAC (CIAAW)
The standard atomic weight of a chemical element (symbol Ar°(E) for element "E") is the weighted arithmetic mean of the relative isotopic masses of all
Standard_atomic_weight
City in Bingham County, Idaho, United States
Atomic City is an unincorporated area in Bingham County, Idaho, United States. The population was 41 at the 2020 census, up from 29 in 2010. Atomic City
Atomic_City,_Idaho
Chemical law about ratio of substances in a compound
was the fundamental atomic unit. From this hypothesis was derived the whole number rule, which was the rule of thumb that atomic masses were whole-number
Law_of_definite_proportions
Indian nuclear physicist (1909–1966)
well as the founding director of the Atomic Energy Establishment, Trombay (AEET) which was renamed the Bhabha Atomic Research Centre in his honour. TIFR
Homi_J._Bhabha
Atom of helium
energy of the helium atom is −79.005154539(25) eV, or −2.90338583(13) Atomic units a.u., which equals −5.80677166(26) Ry. Araki–Sucher correction Fermi
Helium_atom
Primary time standard globally used to regulate clocks and time
such as UT1 and International Atomic Time (TAI), are also used alongside UTC. UTC is based on TAI (International Atomic Time, abbreviated from its French
Coordinated_Universal_Time
Version control operation
Unstructured merge operates on raw text, typically using lines of text as atomic units. This is what Unix tools (diff/patch) and CVS tools (SVN, Git) use. This
Merge_(version_control)
Software design structured around a node graph
atomic functional units. Node graphs are a type of visual programming language. The source code for the software application is organized into atomic
Node_graph_architecture
Nuclear power plant south of Chennai, India
power station[citation needed], with two units each generating 220 MW of electricity. The first and second units of the station went critical in 1983 and
Madras_Atomic_Power_Station
Sub-field of computer graphics
pixels inside each triangle. These triangles are then decomposed into atomic units called fragments that are suitable for displaying on a display screen
Real-time_computer_graphics
Chemical substance not composed of simpler ones
universal atomic mass units (symbol: u). Its relative atomic mass is a dimensionless number equal to the atomic mass divided by the atomic mass constant
Chemical_element
ATOMIC UNITS
ATOMIC UNITS
Boy/Male
Tamil
Atom
Girl/Female
Hindu
Atom
Boy/Male
Czechoslovakian
Boy/Male
Gujarati, Hindu, Indian
Topic; Subject
Girl/Female
British, English, French, Italian
Lovely
Boy/Male
Tamil
Atom
Boy/Male
Hindu
Atom
Girl/Female
Indian
Atom
Girl/Female
Gujarati, Hindu, Indian, Marathi, Telugu
Sunrise; Comic
Boy/Male
Hindu
Atom
Male
Japanese
(富) Japanese name TOMIO means "treasured man."
Girl/Female
Hebrew
Strong as an oak.
Boy/Male
Anglo Saxon
Horrible.
Girl/Female
Tamil
Anu Keerthi | அநà¯Â கிரதீ Â
Atom
Anu Keerthi | அநà¯Â கிரதீ Â
Male
Hungarian
Pet form of Hungarian Tamás, TOMI means "twin."
Boy/Male
African, Australian, Finnish, Japanese
The People; Twin; Happy Child
Boy/Male
Hindu, Indian
Relating to the Soul
Boy/Male
Indian
An Atom's Warrior
Girl/Female
Tamil
Atom
Boy/Male
Hindu
The soul
ATOMIC UNITS
ATOMIC UNITS
Girl/Female
Hindu, Indian
Lord of Gem
Girl/Female
Gujarati, Hindu, Indian, Modern
From Devine Sound Aum
Boy/Male
Sikh
Victorious supporter
Girl/Female
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Tamil, Telugu
Sunshine; Perfect; Bright
Girl/Female
Tamil
Nritta | நà¯à®°à¯€à®¤à¯à®¤à®¾
Pure dance
Surname or Lastname
English
English : unexplained.Thomas Woolson, from England, settled in Cambridge, MA, before 1660.
Boy/Male
Indian
The holy, The divine, The pure, The purifier
Girl/Female
American, Australian, Bengali, British, Chinese, Christian, Danish, Dutch, English, French, Gujarati, Indian, Jamaican, Kannada, Latin, Portuguese, Punjabi, Sikh, Swedish, Tamil
Reddish; Red Colored Precious Gemstone; Red; Ruby Jewel; Reborn; The Red Gemstone
Boy/Male
Muslim American
Locust. Liberal.
Surname or Lastname
English
English : habitational name from Great or Little Blencow in Cumbria, named with a Celtic word blain ‘summit’ and an obscure second element to which Old Norse haugr ‘hill’ has been added.
ATOMIC UNITS
ATOMIC UNITS
ATOMIC UNITS
ATOMIC UNITS
ATOMIC UNITS
n.
An atom; a mite; a pigmy.
a.
Relating to the etymon; as, an etymic word.
n.
A tonic element or letter; a vowel or a diphthong.
a.
Having two replaceable atoms or radicals.
a.
Unaccented; as, an atonic syllable.
a.
Alt. of Atomical
n.
The doctrine of atoms. See Atomic philosophy, under Atomic.
n.
An Adonic verse.
a.
Containing two atoms.
a.
Aeolian, 1; as, the Aeolic dialect; the Aeolic mode.
a.
Pertaining to azote, or nitrogen; formed or consisting of azote; nitric; as, azotic gas; azotic acid.
a.
Of or pertaining to atoms.
n.
One who holds to the atomic philosophy or theory.
a.
Of or pertaining to atoms; relating to atomism.
v. t.
To reduce to atoms.
a.
Produced without sexual union; as, agamic or unfertilized eggs.
a.
Characterized by atony, or want of vital energy; as, an atonic disease.
n.
Nomic spelling.
a.
Pertaining to, or characterized by, aptotes; uninflected; as, aptotic languages.
v. t.
To reduce to atoms, or to fine spray.