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The amount of heat that must be removed from one gram of a liquid at its freezing point to freeze it with no change in temperature.

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Artificial Transmutation

An artificially induced nuclear reaction caused by the bombardment of a nucleus with subatomic particiles or small nucei.

Leclanche Cell

A common type of dry cell.

Melting Point

The temperature at which liquid and solid coexist in equilibrium, also the freezing point.

Autoionization

An ionization reaction between identical molecules.

Mother Nuclide

Nuclide that undergoes nuclear decay.

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.

Adsorption

Adhesion of a species onto the surfaces of particles.

Noble Gases (Rare Gases)

Elements of the periodic Group 0, also called rare gases, formerly called inert gases, He,Ne,Ar, Kr, Xe, Rn.

Heisenberg Uncertainty Principle

It is impossible to determine accurately both the momentum and position of an electron simultaneously.

Concentration

Amount of solute per unit volume or mass of solvent or of solution.