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The temperature above which a gas cannot be liquefied, the temperature above which a substance cannot exhibit distinct gas and liquid phases.

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Catenation

Bonding of atoms of the same element into chains or rings.
The bonding together of atoms of the same element to form chains.
The ability of an element to bond to itself.

Aromatic Hydrocarbons

Benzene and its derivatives.

Melting Point

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

Isomorphous

Refers to crystals having the same atomic arrangement.

Electrode Potentials

Potentials, E, of half-reactions as reductions versus the standard hydrogen electrode.

Dosimeter

A small, calibrated electroscope worn by laboratory personnel and designated to detect and measure incident ionizing radiation or chemical exposure.

Formal Charge

A method of counting electrons in a covalently bonded molecule or ion, counts bonding electrons as though they were equally shared between the two atoms.

Film badge

A small patch of photographic film worn on clothing to detect and measure accumulated incident ionizing radiation.

Positron

A Nuclear particle with the mass of an electron but opposite charge.

Electrolytic Cells

Electrochemical cells in which electrical energy causes nospontaneous redox reactions to occur. An electrochemical cell in which chemical reactions are forced to occur by the application of an outside source of electrical energy.