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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.
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