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Atomic energy
The energy generated from the splitting of the atom (though nuclear fusion would later add further possibilities). -
Bohr atomic model
The Bohr model stabilized Rutherford's original picture by showing that the atom could exist only in discrete energy states. -
Complementarity
In light of the indeterminacy set forth by Heisenberg's uncertainty principle, the principle of complementarity argues that two answers are preferable to one when neither is itself complete. -
Compound nucleus
A temporary excited state of the nucleus that occurs upon the collision of two particles. Bohr postulated that the nucleus might discharge this excess energy through the emission of radiation. -
Copenhagen Institute
Founded and headed by Bohr, this Institute soon became the world center for modern physics. Here Bohr cultivated new generations of physicists, while hosting colloquia that would repeatedly alter the course of history. -
Correspondence principle
This principle states that a new theory must be applicable to all phenomena for which a preceding theory was valid. It applies particularly to theories at the atomic level, which had to be evaluated against traditional phenomena as well, since classical physics had successfully explained it. -
Liquid-drop model
A theoretical model proposed by Bohr that compares the nucleus to a drop of liquid. This model would later have consequences for the discovery of fission. -
Nuclear fission
A nuclear reaction in which the nucleus of an atom, usually uranium, is split into two fragments, leading to the release of a great deal of energy. -
Quantum theory
A theory that addresses the duality of matter and energy, which have the properties of both particles and waves. In creating his atomic model, Bohr specifically applied Planck's idea that energy consists of discrete packets called quanta. -
Stationary state
A state of an atomic system that has a defined energy level associated with it. -
Uncertainty principle
Formulated by Heisenberg, this principle states that the velocity and position of an electron can never be exactly determined, since the act of measurement necessarily disturbs the conditions.
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