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Change in the concentration of a reactant or product per unit time.

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Basic Anhydride

The oxide of a metal that reacts with water to form a base.

Absolute Zero

The zero point on the absolute temperature scale, -273.15°C or 0 K, theoretically, the temperature at which molecular motion ceases. The concept of an absolute zero temperature was first deduced from experiments with gases. When a fixed volume of gas is cooled, its pressure decreases with its temperature. Absolute zero physically possesses quantum mechanical zero-point energy.

Acidic Salt

A salt containing an ionizable hydrogen atom. Acidic salt does not necessarily produce acidic solutions.

Nucleons

Particles comprising the nucleus, protons and neutrons.

Ionization Isomers

Isomers that result from the interchange of ions inside and outside the coordination sphere.

Heat

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

Film badge

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

Differential Scanning Calorimetry (DSC)

A technique for measuring the temperature, direction, and magnitude of thermal transitions in a sample material by heating/cooling and comparing the amount of energy required to maintain its rate of temperature increase or decrease with an inert reference material under similar conditions.

Hydrophilic Colloids

Colloidal particles that repel water molecules.

Particulate Matter

Fine divided solid particles suspended in polluted air.