Chemical Formulas Chemical formula A shorthand notation for a compound or diatomic element Shows the elements and how many atoms of each element are in the compoundmolecule C 6 H 12 O ID: 1042863
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1. Chemical Reactions, Formulas, and Equations
2. Chemical FormulasChemical formula - A shorthand notation for a compound or diatomic element.Shows the elements and how many atoms of each element are in the compound/molecule.C6 H12O6Element SymbolsSubscriptsSubscripts – Number written below and to the right of a chemical symbol. Shows the number of atoms of each element.
3. Signs of a Chemical ReactionClues to chemical reaction1. Gas Formation2. Precipitate3. Color Change4. Energy Change5. Sound6. Light7. Odor
4. Chemical ReactionsChemical reaction – a process by which one or more substances undergo a chemical change (React) to produce one or more different (New) substances.New substances form because chemical bonds break and form new bonds.Different _________ and ________ propertiesChemical Reactions are shown by writing chemical equations.PhysicalChemical
5. Chemical Equations and PartsChemical Equation – A representation of a chemical reaction where the reactants and products are expressed in formulasReactants - Starting materials that change Products – New substances formed “Ending Materials”_______________ produce the _________________.Coefficients – Number placed in front of a formula to balance equations.REACTANTS2H2 + O2 2H2OPRODUCTSYieldsReactantsProductsCoefficients