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What is 1 + 3?
a substance formed as a result of a chemical reaction
materials that are present before a reaction
a reaction with 2 or more substances combine to form a more complex compound
a reaction where one element replaces another in a compound
a number in a chemical formula that tells the atoms in a molecule or ratio of elements in a compound
conservation of mass
matter is not created or destroyed during a chemical reaction
a numer telling how many molecules are involved in a chemical reaction
a reaction where compounds are broken down into simpler products
a combination of symbols that represent the elements in a compound
uses symbols and formulas instead of words to show a chemical reaction