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A heavy, colorless, chemically inactive, monatomic gaseous element used for filling radio, television, and luminescent tubes. Symbol: Xe, at. wt.: 131.30, at. no.: 54.

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Derivative

A compound that can be imagined to arise from a partent compound by replacement of one atom with another atom or group of atoms. Used extensively in orgainic chemistry to assist in identifying compounds.

Overlap

The interaction of orbitals on different atoms in the same region of space.

Insoluble Compound

A very slightly soluble compound.

Specific Heat

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

Spectrum

Display of component wavelengths (colours) of electromagnetic radiation.

Differential Thermal Analysis (DTA)

A technique for observing the temperature, direction, and magnitude of thermally induced transitions in a material by heating/cooling a sample and comparing its temperature with that of an inert reference material under similar conditions.

Dipole-dipole Interactions

Attractive interactions between polar molecules, that is, between molecules with permanent dipoles.

Melting Point

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

Tetrahedral

A term used to describe molecules and polyatomic ions that have one atom in center and four atoms at the corners of a tetrahedron.

Saccharide

An organic compound containing a sugar or sugars.