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

 

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Dermal toxicity

Adverse health effects resulting from skin exposure ot a substance.

Greenhouse Effect

Trapping of heat at the surface of the earth by carbon dioxide and water vapour in the atmosphere.

Doublet

Two peaks or bands of about equal intensity appearing close together on a spectrogram.

Dextrorotatory

Refers to an optically active substance that rotates the plane of plane polarized light clockwise, also called dextro.

Formula Unit

The smallest repeating unit of a substance. The molecule for nonionic substances

xenon trioxide

A colorless, nonvolatile solid, XeO3, explosive when dry: in solution it is called xenic acid.

Solvolysis

The reaction of a substance with the solvent in which it is dissolved.

Polymer

A large molecule consisting of chains or rings of linked monomer units, usually characterized by high melting and boiling points.

Saccharic acid

A white, needlelike, crystalline, water-soluble solid or syrup, C6H10O8, usually made by the oxidation of cane sugar, glucose, or starch by nitric acid. Also called "Glucaric acid."

Ionization Energy

The minimum amount of energy required to remove the most loosely held electron of an isolated gaseous atom or ion.