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A thin partition between two solutions through which certain molecules can pass but others cannot.

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Fluorescence

Absorption of high energy radiation by a substance and subsequent emission of visible light.

Spectrum

Display of component wavelengths (colours) of electromagnetic radiation.

Half-Reaction

Either the oxidation part or the reduction part of a redox reaction.

Nucleons

Particles comprising the nucleus, protons and neutrons.

Electroplating

Plating a metal onto a (cathodic) surface by electrolysis.

Amphiprotism

Ability of a substance to exhibit amphiprotism by accepting donated protons.

Solubility Product Principle

The solubility product constant expression for a slightly soluble compound is the product of the concentrations of the constituent ions, each raised to the power that corresponds to the number of ions in one formula unit.

Adsorption

Adhesion of a species onto the surfaces of particles.

Electron

A subatomic particle having a mass of 0.00054858 amu and a charge of 1-.

Background Radiation

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