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The amount of heat absorbed in the formation of one mole of a substance in a specified state from its elements in their standard states.

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Mass

A measure of the amount of matter in an object. Mass is usually measured in grams or kilograms.

xenon

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.

Rate-law Expression

Equation relating the rate of a reaction to the concentrations of the reactants and the specific rate of the constant.

Photon

A packet of light or electromagnetic radiation, also called quantum of light.

 

Electrophoresis

A technique for separation of ions by rate and direction of migration in an electric field.

Hydrolysis

The reaction of a substance with water or its ions.

Peroxide

A compound containing oxygen in the -1 oxidation state. Metal peroxides contain the peroxide ion, O22

Crystal Lattice Energy

Amount of energy that holds a crystal together, the energy change when a mole of solid is formed from its constituent molecules or ions (for ionic compounds) in their gaseous state.

Actinides

Elements 89 to 103 (between lawrencium and actinium) on the periodic table. Only the first four have been found in nature in appreciable amounts. The remainder have been produced synthetically.

Heat Capacity

The amount of heat required to raise the temperature of a body (of any mass) one degree Celsius.