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Pure Substances

Pure Substances

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Pure Substances

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  1. Pure Substances Mr. Skirbst Physical Science Topic 12

  2. Pure Substances

  3. Pure Substances Made of only one kind of material and has definite properties

  4. Pure Substances Elements – simplest pure substance

  5. Pure Substances Elements – simplest pure substance Atoms – basic building block of all matter (simplest part of an element)

  6. Pure Substances Elements – simplest pure substance Atoms – basic building block of all matter (simplest part of an element) Symbols – element shorthand

  7. Pure Substances Compounds – - pure substance made of more than one element (chemically combined) - can be chemically broken down

  8. Pure Substances Compounds – - pure substance made of more than one element (chemically combined) - can be chemically broken down Molecule – smallest part of a compound keeping characteristics

  9. Chemical Formulas Shorthand for chemical substances (ex. H2O, NaCl, CO2, HCl) Subscript - # of atoms

  10. Chemical Equations Shorthand for chemical reaction Ex. Coefficient - # of molecules Yields – arrow indicating direction of reaction

  11. Chemical Equations 2 Fe + 3 S  Fe2S3 (reactants) (yields) (products)