Chemistry key terms

An insoluble white compound, $\mathrm{BaSO_4}$, formed when barium ions react with sulfate ions in solution.

A protective layer that keeps substances in the environment from reaching the material beneath it.

A particle that accepts a proton in a proton-transfer reaction.

The starting line on chromatography paper where samples are placed.

The tallest peak in a mass spectrum, assigned a relative abundance of 100.

The common basis on which products are compared, such as one bag, one use or the entire working life of an appliance.

Manufacture in which a fixed quantity of product is made at one time before the equipment is prepared for another run.

Two or more cells connected together, normally in series to provide a greater total voltage.

An aluminium-rich ore from which aluminium oxide is obtained for aluminium extraction.

A helpful or desirable outcome for an individual, group or the environment.

A smooth line or curve drawn to represent the overall pattern of plotted data.

A line or smooth curve drawn to represent the overall pattern of experimental results rather than joining every point mechanically.

A tendency for the selection or presentation of evidence to favour a particular conclusion.

Containing only two different elements.

A compound made from two different elements.

An ionic compound containing only two different elements, usually a metal and a non-metal.

The gradual increase in the amount of a substance within organisms over time.

Able to be broken down naturally by microorganisms.

The variety of different living organisms in an area or across Earth.

A biological extraction method in which bacteria help produce a leachate solution containing dissolved metal compounds.

The use of microorganisms to break down biodegradable organic matter in wastewater.

A thick crude oil fraction used as a surfacing material for roads and roofs.

The chemical removal of colour from a substance.

Indicator paper coloured with litmus that changes from blue to red under acidic conditions.

The change of state from a liquid to a gas throughout the liquid, with bubbles forming.

The temperature at which a liquid boils and changes to a gas throughout the liquid.

The separation of particles that were joined by a chemical bond; energy must be supplied for this to happen.

The energy required to break one mole of a specified type of chemical bond; it is usually given in kJ/mol.

The type of attraction that joins particles and the pattern in which those particles are organised.

A pair of electrons shared between two atoms; it represents one covalent bond.