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Ratiation extraneous to an experiment. Usually the low-level natural radiation form cosmic rays and trace radioactive substances present in our environment.

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Amino Acid

Compound containing both an amino and a carboxylic acid group.The --NH2 group.

Radical

An atom or group of atoms that contains one or more unpaired electrons (usually very reactive species)

Density

Density is the ratio b/w Mass and Volume: D=M/V

Supercooled Liquids

Liquids that, when cooled, apparently solidify but actually continue to flow very slowly under the influence of gravity e.g glass.

Double Salt

Solid consisting of two co-crystallized salts.

 

Weak Electrolyte

A substance that conducts electricity poorly in a dilute aqueous solution.

Gamma Ray

High energy electromagnetic radiation. A highly penetrating type of nuclear radiation similar to x-ray radiation, except that it comes from within the nucleus of an atom and has a higher energy. Energywise, very similar to cosmic ray except that cosmic rays originate from outer space.

Aldehyde

Compound in which an alkyl or aryl group and a hydrogen atom are attached to a carbonyl group and a hydrogen atom are attached to a carbonyl group, general formula, O-R-C-H

 

Dumas Method

A method used to determine the molecular weights of volatile liquids.

Mass

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