| Question | Answer |
| A substance that forms H+ ions when it is dissolved in water | Acid
|
The minimum energy that must be provided before a reaction can take place | Activation Energy
| A negatively charged ion | Anion
| A substance that neutralises an acid | Base
| The average energy associated with breaking or forming a particular covalent bond | Bond energy
| A method for determining energy changes in reactions | Calorimetry
| A chemical that speeds up a reaction but remains unchanged at the end | Catalyst
| A negatively charged electrode | Cathode
| A bond formed when electrons are shared | Covalent
| A reaction in which one element takes the place of another in a compound | Displacement
| Breaking down a compound using electricity | Electrolysis
| A type of reaction when energy is taken in from the surroundings | Endothermic
| A chemical reaction where the forwards and backwards reactions can both occur | Equilibrium
| The sum of all the atomic masses of the atoms in a formula | Formula mass
| A vertical column of elements in the Periodic Table | Group
| The Group 7 elements | Halogens
| Substance which changes colour in an acid or alkali | Indicator
| A bond that involves the transfer of electrons | Ionic
| Atoms of the same element that contain different numbers of neutrons | Isotopes
| The total number of protons and neutrons in an atom | Mass number
| A reaction in which an acid reacts with a base to produce salt plus water | Neutralisation
| A mineral from which a metal may be extracted | Ore
| The addition of oxygen or loss of electrons in a chemical reaction | Oxidation
| A row in the Periodic Table | Period
| The chemicals taking part in a chemical reaction | Reactants
| The loss of oxygen or gain of electrons | Reduction
| A substance that dissolves in a solvent to form a solution | Solute
| The breaking down of a compound by heat | Thermal Decomposition
| An accurate method for calculating the concentration of an acid or alkali solution in a neutralisation reaction | Titration
| Amount of substance produced in a chemical reaction | Yield |
