AQA GCSE Chemistry key terms

The reactant that is completely used up in a reaction and therefore determines the maximum amount of product that can form.

A pattern of separate bright lines at particular wavelengths in light emitted by a substance.

Paper containing a coloured indicator that responds to acidic or alkaline conditions.

The energy level closest to the nucleus that is not already filled to the relevant capacity.

An ore containing only a small proportion of the desired metal or its compounds.

The ability of a material to be hammered or pressed into a new shape without breaking.

Able to be hammered or pressed into shape without breaking.

The hiding of one flame colour by another, usually stronger, flame colour.

The total number of protons and neutrons in the nucleus of one atom.

The material in a composite that surrounds and binds the reinforcement together.

A substance that has mass and occupies space; all matter is made from tiny particles ultimately built from atoms.

The greatest amount of product predicted from the balanced equation and the available limiting reactant.

The greatest mass of product predicted from the balanced equation when the relevant reactant is converted into product as specified by that equation.

A result obtained by adding the retained repeat measurements and dividing by the number of those measurements.

The quantity of reactant used or product formed during a time interval divided by the length of that interval.

The unavoidable doubt about the value of a measurement; it describes an estimated interval within which the measured value may lie.

The change of state from a solid to a liquid.

The temperature at which a substance changes from solid to liquid.

An element that reacts to form positive ions by losing electrons.

A compound containing the carbonate ion, $CO_3^{2-}$, which reacts with an acid to produce a salt, water and carbon dioxide.

A compound containing hydroxide ions, $\mathrm{OH^-}$; soluble Group 1 hydroxides produce alkaline solutions.

A strong electrostatic attraction between positive metal ions and delocalised electrons in a giant metallic structure.

The electrostatic attraction between positive metal ions and delocalised electrons throughout a metal.

A giant structure of positive metal ions surrounded by delocalised electrons.

A compound containing a metal chemically bonded to oxygen.

Liquids that mix together.

Two or more elements or compounds together without being chemically combined.