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The minimum mass of a particular fissionable nuclide in a given volume required to sustain a nuclear chain reaction.

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Donor Atom

A ligand atom whose electrons are shared with a Lewis acid.

Ore

A natural deposit containing a mineral of an element to be extracted.

Ligand

A Lewis base in a coordination compound.

Binding Energy (nuclear binding energy)

The energy equivalent (E = mc^2) of the mass deficiency of an atom.  where: E = is the energy in joules, m is the mass in kilograms, and c is the speed of light in m/s^2

Nuclear Reaction

Involves a change in the composition of a nucleus and can evolve or absorb an extraordinarily large amount of energy.

Conformations

Structures of a compound that differ by the extent of rotation about a single bond.

Ioniztion

The breaking up of a compound into separate ions.

Turning iron nail into copper nail

This simple chemical experiment shows the so-called process of copper plating of metal products. Copper has the ability to deposit on a metal surface.

Photochemical Smog

A brownish smog occurring in urban areas receiving large amounts of sunlight, caused by photochemical (light-induced) reactions among nitrogen oxides, hydrocarbons and other components of polluted air that produce photochemical oxidants.

 

Neutralization

The reaction of an acid with a base to form a salt and water. Usually, the reaction of hydrogen ions with hydrogen ions to form water molecules.