The smallest particle of a chemical element that can exist
Atomic particles as a source of nuclear energy
they build tiny circuits atom by atom
Free of atomic weapons or atomic energy; specifically = nuclear-free.
An atom that has a very high kinetic or internal energy, usually as a result of a nuclear process.
A constituent part of an atom; a subatomic particle.
A bomb which derives its destructive power from the rapid release of nuclear energy by fission of heavy atomic nuclei, causing damage through heat, blast, and radioactivity
Having been hit or destroyed by an atom bomb.
A quantum system for producing a beam of atoms in a coherent state, analogous to the photons in an optical laser.
The branch of physics concerned with phenomena in which the wavelike properties of cold neutral atoms are significant and behaviour analogous to that of light waves is observed.
An instrument for ascertaining information about individual atoms in a sample; specifically one consisting of a field-ion microscope, in which ionized atoms evaporated from the sample surface are accelerated, and a mass spectrometer in which they are analysed.
A theory that assumes the existence of atoms or an atomic constitution; (Science) atomic theory.
A radioactive atom; an atom of a radionuclide.
An atom in which inner-shell electrons are missing, usually as a result of electrical excitation
The action or an act of attacking by dropping an atom bomb.
Capable of producing the fission or nuclear rearrangement of atoms.
The atom regarded as having the charges of one sign surrounding a smaller central cluster of those of the opposite sign.
An ultimate component particle of which material substances are composed or into which they may be physically divided.
Informal term for particle accelerator.
An atom in a highly excited state in which one electron has almost sufficient energy to escape. Atoms, usually hydrogen atoms, in this Rydberg state are used in atomic research
An artificial physical system containing electrons in discrete quantum states (resembling those of electrons within atoms); specifically = quantum dot.
An atom in which negatively charged electrons are conceived as orbiting an extremely dense, positively charged nucleus; an atom described by the Rutherford model.