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Refers to different atomic forms of all elements in contrast to ?isotopes?, which refer only to different atomic forms of a single element.

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Polymerization

The combination of many small molecules to form large molecules.

Spectrochemical Series

Arrangement of ligands in order of increasing ligand field strength.

Heat Capacity

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

ytterbium

A rare metallic element found in gadolinite and forming compounds resembling those of yttrium. Symbol: Yb, at. wt.: 173.04, at. no.: 70, sp. gr.: 6.96. Cf."rare-earth element."

 

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.

Bonding Pair

Pair of electrons involved in a covalent bond.

Insulator

Poor electric and heat conductor.

Polarization

The buildup of a product of oxidation or a reduction of an electrode, preventing further reaction.

Chemical Change

A change in which one or more new substances are formed.

Manometer

A two-armed barometer.

xylose

A colorless, crystalline pentose sugar, C5H10O5, derived from xylan, straw, corncobs, etc., by treating with heated dilute sulfuric acid, and dehydrating to furfural if stronger acid is used.

Dosimeter

A small, calibrated electroscope worn by laboratory personnel and designated to detect and measure incident ionizing radiation or chemical exposure.

Liquid Aerosol

Colloidal suspension of liquid in gas.

Deuterium

An isotope of hydrogen whose atoms are twice as massive as ordinary hydrogen,deuterion atoms contain both a proton and a neutron in the nucleus.

Valence Shell Electron Pair Repulsion Theory

Assumes that electron pairs are arranged around the central element of a molecule or polyatomic ion so that there is maximum separation (and minimum repulsion) among regions of high electron density.

 

Cell Potential

Potential difference, Ecell, between oxidation and reduction half-cells under nonstandard conditions.

 

Specific Heat

The amount of heat required to raise the temperature of one gram of substance one degree Celsius.

Conduction Band

A partially filled band or a band of vacant energy levels just higher in energy than a filled band, a band within which, or into which, electrons must be promoted to allow electrical conduction to occur in a solid.

Barometer

A device for measuring pressure.

Homologous Series

A series of compounds in which each member differs from the next by a specific number and kind of atoms.