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The process in which a heavy nucleus splits into nuclei of intermediate masses and one or more protons are emitted.

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Coordination Sphere

The metal ion and its coordinating ligands but not any uncoordinated counter-ions.

Solvent

The dispersing medium of a solution.

Corrosion

Oxidation of metals in the presence of air and moisture.

Pauli Exclusion Principle

No two electrons in the same atom may have identical sets of four quantum numbers.

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.

Fast Neutron

A neutron ejected at high kinetic energy in a nuclear reaction.

Crystalline Solid

A solid characterized by a regular, ordered arrangement of particles.

Specific Heat

The amount of heat required to raise the temperature of one gram of substance one degree Celsius.

Pairing

A favourable interaction of two electrons with opposite m , values in the same orbital.

Lanthanide Contraction

A decrease in the radii of the elements following the lanthanides compared to what would be expected if there were no f-transition metals.