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Term | Definition |
---|---|
Pure Substance | substance made of one kind of materials having definite properties. |
Element | pure substance made up of only one type of atom |
Compound | pure substance made up of two or more elements which have been chemically joined |
Molecule | smallest unit of a compound Water Molecule |
Chemical Formula | combination of chemical symbols used to represent a compound |
Chemical Equation | expression using symbols, formulas and numbers are used to represent a compound. |
Coefficient | number in front of a chemical formula or symbol that tells you how many molecules are involved in the reaction. |
Subscript | Shows the number of atoms of an element in a molecule. |
Reactant | Materials present before a reaction |
Product | materials present after a reaction. |