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Weighted average of the masses of the constituent isotopes of an element, The relative masses of atoms of different elements.

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Indicators

For acid-base titrations, organic compounds that exhibit different colors in solutions of different acidities, used to determine the point at which reaction between two solutes is complete.

Electrolysis

Process that occurs in electrolytic cells.

Manometer

A two-armed barometer.

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."

 

Chemical Periodicity

The variations in properties of elements with their position in the periodic table.

Meniscus

The shape assumed by the surface of a liquid in a cylindrical container.

Daughter Nuclide

Nuclide that is produced in a nuclear decay.

 

Crystal Lattice

A pattern of arrangement of particles in a crystal.

Coulometry

The quantitative application of Faraday's Law to the analysis of materials. The current and time are the usual variables measured.

Zone Refining

A method of purifying a bar of metal by passing it through an induction heater, this causes impurties to move along a melted portion. This method applies the fact when a metal crystallizes on cooling, impurities are automatically expelled as they do not form part of the crystal.