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Vocabulary

TermDefinition
Chemical Formula A shorthand way to use chemical symbols and numbers to represent a substance. (H20)
Chemical Equation Uses symbols to show the relationship between the reaction and the products. C+O2=CO2
Subscript (H2O)-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 the 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
Chemical Reaction When atoms of elements break apart and rearrange to become new substances.
Synthesis Reaction-Magnesium combines with oxygen to make magnesium oxide When two or more substances combine to create one new compound.
Decomposition Reaction-Sugar breaks down into carbon,oxygen and hydrogen A reaction where a single compound breaks down to form 2 simpler substances
Single-Displacement Reaction-sodium replaces hydrogen in water 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 reactions.
Law of Conservation of Mass States that mass is neither created nor destroyed in a chemical reaction.
Created by: Eva16
 

 



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