Edexcel GCSE Chemistry key terms

Resistance to being stretched or pulled apart.

The maximum mass of product predicted from the amount of limiting reactant using a balanced equation.

A reaction in which heat causes one substance to break down into two or more substances.

Electromagnetic radiation emitted by warm objects; the relatively cool Earth emits much of its energy as thermal infrared radiation.

A representation that shows or suggests height, width and depth.

An arrangement that has length, width and depth.

A method of finding the volume of one solution needed to react exactly with a measured volume of another solution.

The volume of solution delivered from a burette, calculated by subtracting its initial reading from its final reading.

The ability to absorb energy and resist cracking or breaking.

Poisonous; able to cause serious harm or death if a sufficient amount enters the body.

A poisonous gas that harms living organisms when inhaled.

A metal from the central block of the periodic table; its compounds are often coloured.

A regular change in a property across a sequence of elements, which can be used to make predictions.

A two-dimensional drawing or image used to communicate features of an object or structure that may actually extend in three dimensions.

Radiation from sunlight that sunscreen is designed to stop reaching the skin.

The degree of doubt associated with a measurement, reconstruction or conclusion.

An element found in nature without being chemically combined with another element.

A result that distinguishes one possible ion from all the other ions being considered.

A hydrocarbon containing at least one carbon–carbon double bond.

The combining power of an element, shown by how its atoms combine with atoms of other elements.

A conclusion based on personal or social priorities when different effects cannot be compared by measurement alone.

The change of state from a liquid to a gas.

A measure of a fluid’s resistance to flow. A more viscous liquid flows less easily.

Processes associated with volcanoes, including eruptions and the release of gases from within the Earth.

The release of gases from the Earth’s interior through volcanic activity.

The potential difference between two points, which can drive an electric current through a circuit; measured in volts (V).

The amount of three-dimensional space occupied by a substance.