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Refers to crystals having the same atomic arrangement.

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Atomic Mass Unit (amu)

One twelfth of a mass of an atom of the carbon-12 isotope, a unit used for stating atomic and formula weights, also called dalton.

Silicones

Polymeric organosilicon compounds, contain individual or cross-linked Si-O chains or rings in which some oxygens of SiO4 tetrahedra are replaced by other groups.

Viscosity

Resistance offered by the molecules of a liquid to flow is termed as viscosity.

Titration

A Procedure in which one solution is added to another solution until the chemical reaction between the two solutes is complete, the concentration of one solution is known and that of the other is unknown.

 

Polyprotic Acid

An Acid that can form two or more hydronium ions per molecule, often a least one step of ionization is weak.

Peroxide

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

Substance

Any kind of matter all specimens of which have the same chemical composition and physical properties.

 

Downs Cell

Electrolytic cell for the commercial electrolysis of molten sodium chloride. For further information see Electrochemistry or Fuel Cells.

Film badge

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

Primary Standard

A substance of a known high degree of purity that undergoes one invariable reaction with the other reactant of interest.