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The rate at which a particular substance will vapourize (evaporate) when compared to the rate of a known substance such as ethyl ether. This term is especially useful for health and fire-hazard considerations.

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K Capture

Absorption of a K shell (n=1) electron by a proton as it is converted to a neutron.

Autoionization

An ionization reaction between identical molecules.

Ferromagnetism

The ability of a substance to become permanently magnetized by exposure to an external magnetic field.

Heterogeneous Mixture

A mixture that does not have uniform composition and properties throughout.

Optical Activity

The rotation of plane polarized light by one of a pair of optical isomers.

 

Overlap

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

xenon hexafluoride

A colorless, crystalline compound, XeF6, that melts at 50°C to a yellow liquid, and boils at 75°C.

Canal Ray

Stream of positively charged particles (cations) that moves toward the negative electrode in cathode ray tubes, observed to pass through canals in the negative electrode.

Carcinogen

A substance capable of causing or producing cancer in mammals.

 

Zone Refining

A method of purifying a bar of metal by passing it through an induction heater, this causes impurties to move along a melted portion. This method applies the fact when a metal crystallizes on cooling, impurities are automatically expelled as they do not form part of the crystal.