Atomic orbitals are typically categorized by n, l, and m quantum numbers, which correspond to the electron's energy, angular momentum, and an angular momentum vector component, respectively.

Atomic orbitals exactly describe the shape of this " atmosphere " only when a single electron is present in an atom.

Atomic orbitals may be defined more precisely in formal quantum mechanical language.

Atomic orbitals can be the hydrogen-like " orbitals " which are exact solutions to the Schrödinger equation for a hydrogen-like " atom " ( i. e., an atom with one electron ).

The first few hydrogen atom Atomic orbital | electron orbitals shown as cross-sections with color-coded probability density

The Atomic orbital | orbitals of the hydrogen atom are descriptions of the probability distribution s of an electron bound state | bound to a proton.

In quantum mechanics, the electron s of an atom occupy Atomic orbital | orbitals around the Atomic nucleus | nucleus.

* 1929 Paper introduces the Linear Combination of Atomic Orbitals approximation for molecular orbitals

Atomic orbitals have distinctive shapes denoted by letters.

Atomic semantics are defined for a variable with a single writer but multiple readers.

Atomic semantics are defined formally in Lamport's " On Interprocess Communication " Distributed Computing 1, 2 ( 1986 ), 77-101.

Atomic physics underlies the workings of chemistry, which studies emergent properties that in turn are the basis of biology.

" Atomic " data, that is, data at the lowest level of detail, are stored in the data warehouse.

Atomic properties like the ionization energy are often quoted in electron volts.

According to the International Atomic Energy Agency there are at least 100 research reactors in the world fueled by highly enriched ( weapons-grade / 90 % enrichment uranium ).

Professor John Mueller of Ohio State University, the author of Atomic Obsession, has also dismissed the need to interfere with Iran's nuclear program and expressed that arms control measures are counterproductive.

Atomic absorption lines are observed in the solar spectrum and referred to as Fraunhofer lines after their discoverer.

A summary of the amounts of radioactive wastes and management approaches for most developed countries are presented and reviewed periodically as part of the International Atomic Energy Agency ( IAEA ) Joint Convention on the Safety of Spent Fuel Management and on the Safety of Radioactive Waste Management.

International Atomic Time ( TAI ) is the primary international time standard from which other time standards, including UTC, are calculated.

; Atomic operations: Shared data are accessed by using atomic operations which cannot be interrupted by other threads.

Atomic bombs are based on the theory of nuclear fission, that when a large atom splits it releases a massive amount of energy.

Atomic models will consist of a single nucleus that may be surrounded by one or more bound electrons, whilst molecular models are typically concerned with Molecular Hydrogen and it's Molecular hydrogen ion.

Its Atomic number and atomic symbol are unknown.

The remaining bomb casings are located at the Russian Atomic Weapon Museum, Sarov ( Arzamas-16 ), and the Museum of Nuclear Weapons, All-Russian Research Institute of Technical Physics, Snezhinsk ( Chelyabinsk-70 ).

In various forms, other designs are under development by MIT, University of California at Berkeley, General Atomics ( U. S .), the Dutch company Romawa B. V., Adams Atomic Engines, and Idaho National Laboratory.

These are funded by various national agencies like the Department of Science and Technology, Department of Electronics, Department of Space, Aeronautical Development Agency, Department of Atomic Energy, and Oil and Natural Gas Commission ( ONGC ).

Atomic units are often abbreviated " a. u.

* 1985-1990 in the Film series Back to The Future, references to the Atomic Age and uses of Nuclear Energy are broadly explored ; for example the use of Plutonium in the time machine, the concept of " Mr. Fusion " ( a futuristic small scale fusion reactor for domestic use that can use garbage as fuel ) and references to the common 1950s conceptions of the Atomic Age.

There have also been numerous clones made ( and are still being made ) such as Atomic Tanks, Nasty Armoured Tanks of War, xscorch ( Open Source clone ), Scorched 3D, which attempt to modernize the gameplay and graphics, and others such as Charred Dirt that take a different approach by using a unique graphical style.

A proposal by the U. S. to the United Nations Atomic Energy Commission ( UNAEC ) to a ) extend between all nations the exchange of basic scientific information for peaceful ends ; b ) implement control of atomic energy to the extent necessary to ensure its use only for peaceful purposes ; c ) eliminate from national armaments atomic weapons and all other major weapons adaptable to mass destruction ; and d ) establish effective safeguards by way of inspection and other means to protect complying States against the hazards of violations and evasions.

The Centro Atómico Bariloche is a research center of the National Atomic Energy Commission, where basic and applied research in many areas of the physical sciences is carried out.

In lucha libre, the basic tag team match is referred to as Lucha de Parejas ( Doubles Fight ), a six-man match as a Lucha de Trios, and an eight-man match as a Lucha Atómica ( Atomic Fight ).

His well-known operas include Nixon in China ( 1987 ), which recounts Richard Nixon's 1972 visit to China, and Doctor Atomic ( 2005 ), which covers Robert Oppenheimer, the Manhattan Project, and the building of the first atomic bomb.

The Keys Public School building was rented by AECL ( Atomic Energy Canada Limited ) for use as an office building.

On May 31, 2007, several Ocean County residents attended the Atomic Safety Licensing Board ( ASLB ) hearing in the county administration building.

In the late 1960s, litigation borne of Congress's National Environmental Policy Act eventually spawned one of the most celebrated environmental cases in American history, Calvert Cliffs Coordinating Committee, Inc. v. Atomic Energy Commission, forcing the Atomic Agency Commission to consider the environmental impact of building and maintaining such an atomic energy plant.

The Atoms for Peace symbol mounted over the door to the American swimming pool reactor building during the 1955 International Conference on the Peaceful Uses of Atomic Energy in Geneva, often called the Atoms for Peace conference.

The building was rented out to the International Atomic Energy Agency ( IAEA ), which used it as its headquarters until 1979, when it moved to the Vienna International Centre.

International Atomic Time ( TAI, from the French name Temps atomique international ) is a high-precision atomic coordinate time standard based on the notional passage of proper time on Earth's geoid.

Atomic timekeeping services started experimentally in 1955, using the first caesium atomic clock at the National Physical Laboratory, UK ( NPL ).

Atomic physics is the field of physics that studies atoms as an isolated system of electrons and an atomic nucleus.

The Fat Man | atomic bomb Atomic bombings of Hiroshima and Nagasaki | dropped on Nagasaki had a plutonium charge.

* Atomic units, a system of units convenient for atomic physics and other fields

* Atomic radii of the elements ( data page ) — atomic radius ( empirical ), atomic radius ( calculated ), van der Waals radius, covalent radius

Each line, if its warhead were live, represents the potential explosive power of about 375 kiloton s of TNT, about twelve times larger than the Atomic bombings of Hiroshima and Nagasaki | detonation of the atomic bomb in Hiroshima.

Doctor Atomic ( 2005 ): An opera in two acts, about Robert Oppenheimer, the Manhattan Project, and the creation and testing of the first atomic bomb.

* 1944 – Plutonium is first produced at the Hanford Atomic Facility and subsequently used in the Fat Man atomic bomb dropped on Nagasaki, Japan.

Atomic absorption spectroscopy ( AAS ) and atomic emission spectroscopy ( AES ) involve visible and ultraviolet light.

Had the president ordered an atomic attack in 1947 or 1948, the 509th Composite Bomb Group would have needed five or six days to obtain the bombs from the Atomic Energy Commission and arrive at the base it would attack from.

* To millisecond accuracy, TT runs parallel to the atomic timescale ( International Atomic Time, TAI ) maintained by the BIPM.

* Atomic physics: The discipline dealing with electrons and atomic nuclei.

* August 6 – WWII: Atomic bombing of Hiroshima: A United States B-29 Superfortress, the Enola Gay, drops an atomic bomb, codenamed " Little Boy ", on Hiroshima, Japan, at 8: 15 a. m. ( local time ).

" The following year, J. Robert Oppenheimer, scientific director of the Manhattan Project that built the first atomic bomb, then working as a consultant to the Atomic Energy Commission, was stripped of his security clearance after a four-week hearing.

* Atomic mass unit ( dalton ) – the atomic mass unit

Atomic physics is the field of physics that studies atoms as an isolated system of electrons and an atomic nucleus.

The United States Atomic Energy Commission ( AEC ) was an agency of the United States government established after World War II by Congress to foster and control the peace time development of atomic science and technology.

President Harry S. Truman signed the McMahon / Atomic Energy Act on August 1, 1946, transferring the control of atomic energy from military to civilian hands, effective from January 1, 1947.