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

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Halogens

Group VIIA elements: F, Cl, Br, I

Conjugate Acid-base Pair

In Bronsted-Lowry terminology, a reactant and product that differ by a proton, H+.

Photoelectric Effect

Emission of an electron from the surface of a metal caused by impinging electromagnetic radiation of certain minimum energy, current increases with increasing intensity of radiation.

 

Strong Electrolyte

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

 

Physical Change

A change in which a substance changes from one physical state to another but no substances with different composition are formed. Example Gas to Liquid - Solid.

 

Continuous Spectrum

Spectrum that contains all wave-lengths in a specified region of the electromagnetic spectrum.

Isomers

Different substances that have the same formula.

Basic Anhydride

The oxide of a metal that reacts with water to form a base.

Half-Cell

Compartment in which the oxidation or reduction half-reaction occurs in a voltaic cell.

Flash Point

The temperature at which a liquid will yield enough flamable vapour to ignite. There are various recognized industrial testing methods, therefore the method used must be stated.