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voc chem react
vocabulary words chemical reactions
Term | Definition |
---|---|
Chemical Formula | A shorthand way to use chemical symbols and numbers to represent a substance. (H2O) |
Chemical Reaction | When atoms of elements break apart and rearrange to become new substances |
Synthesis Reaction | When two or more substances combine to create one new compound |
Decomposition Reaction | A reaction where a single compound breaks down to form 2 simpler substances |
Single Displacement Reaction | One element replaces another element in compound leaving a new compound and 1 element |
Double Displacement reaction | The 2 metal ions in 2 compounds switch places in a chemical reaction |
Law of Conservation of mass | States that mass is neither created or destroyed in a chemical reaction. |
Chemical equation | Uses symbols to show the relationship between the reactants and the products. C+O2 CO2 |
Subscript | Small number to the right of the element that shows how many atoms there are of the element. |
Coefficient | The large number that multiplies atoms of that element. 2Cl+3Na |
Reactant | A substance or molecule that starts a chemical reaction. Mg+O2 |
Product | The substance that forms as a result of a chemical reaction. MgO2 |