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A covalent bond in which both shared electrons are donated by the same atom, a bond between a Lewis base and a Lewis acid.

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Heat

A form of energy that flows between two samples of matter because of their differences in temperature.

Critical Pressure

The pressure required to liquefy a gas (vapor) at its critical temperature.

Substance

Any kind of matter all specimens of which have the same chemical composition and physical properties.

 

Bronsted-Lowry Acid

A proton donor.

Compressed Gas

A gas or mixture of gases having, in a container an absolute pressure exceeding 40 psi at 21.1°C (70°F)

Energy

The capacity to do work or transfer heat.

Allotropes

Different forms of the same element in the same physical state.

Percent Purity

The percent of a specified compound or element in an impure sample.

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.

Activity Series

A listing of metals (and hydrogen) in order of decreasing activity.