| A | B |
|---|
| atom | a tiny particle that makes up an element |
| element | a substance that contains only 1 type of atom |
| compound | a substance containing more than 1 type of atom, combined chemically |
| reactant | a substance that takes part in a chemical reaction and is present at the start of the reaction |
| product | a substance that is formed or made during a chemical reaction |
| chemical reaction | when elements or compounds combine to form a new material |
| chemical symbol | an abbreviation used to represent the name of an element, e.g. Ca, S, Fe |
| chemical formula | a way of representing a chemical using letters and numbers, e.g. NaCl, CO2 |
| word equation | a way of showing what happens during a chemical reaction using full words |
| mass | a measure of the amount of matter in an object |
| Bunsen burner | a burner used in the lab to produce a very hot flame |
