If an atom bomb in 1945 could destroy an entire city surely the atomic arsenal we now have is more than adequate to fulfill any military objective required of it.

If it is possible for an enemy to put an atomic bomb on a city, it should be equally possible to put a cloud of biological agent over that city.

The trial will be held, probably the first week of March, in the famous Old Bailey central criminal court where Klaus Fuchs, the naturalized British German born scientist who succeeded in giving American and British atomic bomb secrets to Russia and thereby changed world history during the 1950s, was sentenced to 14 years in prison.

but the United States and the Union of Soviet Socialist Republics nevertheless did eventually agree on an atomic bomb test ban, and a sort of provisional acceptance of each other's good intentions on this limited question.

* 1945 – World War II: Hiroshima, Japan is devastated when the atomic bomb " Little Boy " is dropped by the United States B-29 Enola Gay.

* 1945 – World War II: Nagasaki, Japan is devastated when an atomic bomb, Fat Man, is dropped by the United States B-29 Bockscar.

* 1953 – Nuclear weapons testing: the Soviet atomic bomb project continues with the detonation of Joe 4, the first Soviet thermonuclear weapon.

* 1949 – Soviet atomic bomb project: The Soviet Union tests its first atomic bomb, known as First Lightning or Joe 1, at Semipalatinsk, Kazakhstan.

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

In mid-1948 he participated in the Soviet atomic bomb project under Igor Kurchatov and Igor Tamm.

This led to the creation of the atomic bomb by the United States, which it used in World War II in 1945.

The American economy roared forward, doubling industrial production, and building vast quantities of airplanes, ships, tanks, munitions, and, finally, the atomic bomb.

However, in formulating policies regarding the atomic bomb and relations with the Soviets Truman was guided by the U. S. State Department and ignored Eisenhower and the Pentagon.

Along with J. Robert Oppenheimer, he is frequently referred to as " the father of the atomic bomb ".

In August 1939 Leó Szilárd had prepared and Albert Einstein signed the famous letter warning President Franklin D. Roosevelt of the probability that the Nazis were planning to build an atomic bomb.

This successful initiation of a chain-reacting pile was important not only for its help in assessing the properties of fission — needed for understanding the internal workings of an atomic bomb — but also because it would serve as a pilot plant for the massive reactors which would be created in Hanford, Washington, which would then be used to produce the plutonium needed for the bombs used at the Trinity site and Nagasaki.

On 2 December 1942 he initiated the atomic age with the first self-sustaining chain reaction, after which he became known as " father of the atomic bomb ".

Hammer overturns the underworld in search of the ' great whatsit ' turns out to be — joke of jokes — an exploding atomic bomb.

The helium mass spectrometer was also vital in the atomic bomb Manhattan Project.

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.

The resulting explosion is estimated to have a force of 26 kilotons, slightly more powerful than the Nagasaki atomic bomb.

Atomic orbitals are the basic building blocks of the atomic orbital model ( alternatively known as the electron cloud or wave mechanics model ), a modern framework for visualizing the microscopic behavior of electrons in matter.

In this model the electron cloud of a multi-electron atom may be seen as being built up ( in approximation ) in an electron configuration that is a product of simpler hydrogen-like atomic orbitals.

It consists of a dense core called the atomic nucleus surrounded by a space called the electron cloud.

Depicted are the atomic nucleus | nucleus ( pink ) and the electron cloud distribution ( black ).

Mushroom cloud from the atomic explosion over Nagasaki rising 60, 000 feet into the air on the morning of August 9, 1945.

In atomic physics, the optical depth of a cloud of atoms can be calculated from the quantum mechanical properties of the atoms.

Because Lulin is so active, its atomic cloud is especially dense.

The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the nucleus to the boundary of the surrounding cloud of electrons.

Mushroom cloud from the Atomic bombings of Hiroshima and Nagasaki | atomic bombing of Nagasaki, Japan on August 9, 1945.

Later in 1946, the Operation Crossroads nuclear bomb tests were described as having a " cauliflower " cloud, but a reporter present also spoke of " the mushroom, now the common symbol of the atomic age.

An " atomic pin-up girl " with a ( stemless ) mushroom cloud at Upshot-Knothole Dixie of Operation Upshot-Knothole

Furthermore, there is no need for an atomic form factor to describe the shape of the electron cloud of the atom and the scattering power of an atom does not fall off with the scattering angle as it does for X-rays.

Magnetic scattering does require an atomic form factor as it is caused by the much larger electron cloud around the tiny nucleus.

:* Electron cloud model following the development of quantum mechanics in 1925 and the eventual atomic orbital models derived from the quantum mechanical solution to the hydrogen atom.

Auger electrons similarly arise when an electric field is produced within an atom's electron cloud due to loss of another electron, and this field again induces the acceleration and removal of yet another of the atom's atomic orbital electrons.

In 1976, he protested the air show held in Texas, in which the US Air Force held an imitation of the atomic attack on Hiroshima in the form of a mushroom cloud in the desert.

The atomic bomb's mushroom cloud after detonating over Nagasaki.

Depicted are the atomic nucleus | nucleus ( pink ) and the electron cloud distribution ( black ).

Those charged with foreign policy -- the Secretary of State ( Byrnes ) and the President -- did not have either the facts nor an understanding of what was involved in the atomic energy issue, the most serious cloud hanging over the world.

When they reach atomic scale, the Atoms can arrange themselves into a wide variety of molecular configurations-becoming anything from a lump of gold to a cloud of gas.

The experience acquired by chemists was no longer pertinent to the study of the whole nature of matter but only to aspects related to the electron cloud surrounding the atomic nuclei and the movement of the latter in the electric field induced by the former ( see Born-Oppenheimer approximation ).

The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the nucleus to the boundary of the surrounding cloud of electrons.

An H I region is an interstellar cloud composed of neutral atomic hydrogen ( H I ), in addition to the local abundance of helium and other elements.