The minimum amount of fissile material needed to maintain a nuclear chain reaction.
Heat of Reaction
The change in the enthalpy of a chemical reaction that occurs at a constant pressure.
Elements with more than 92 protons in their nuclei.
The proton and the Neutron.
2 protons and 2 neutrons bond together.
Free Energy (G)
Combined enthalpy and entropy of a system.
Difference between the mass of an atom and the sum of the masses of its protons, neutrons, and
Inner orbital electron is captured by the nucleus of its own atom.
Reaction in which material that starts the reaction is also one of the products that can start
Measure of its burning efficiency.
An electron emitted from nucleus during some kinds of radioactive decay.
Radioactive atoms that are incorporated into substance so that movement of the substance can
be followed by radiation detectors.
Band of Stability
Stable nuclei cluster over a range of neutron-proton ratio.
Activation Energy (Ea)
Minimum energy for a reaction to occur or to transform the reactants into an activated