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Unit 1: Materials: Formulating Matter

Unit 1: Materials: Formulating Matter. Section A: Building Blocks of Chemistry. Properties. Physical Properties : properties that can be determined without altering the chemical makeup of the material color, density and odor

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Unit 1: Materials: Formulating Matter

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  1. Unit 1: Materials: Formulating Matter Section A: Building Blocks of Chemistry

  2. Properties • Physical Properties: properties that can be determined without altering the chemical makeup of the material • color, density and odor • Physical changes: the identity of the substance is not changed • melting, boiling and bending

  3. Properties • Chemical properties: properties that involve transforming the substance into new materials • reactivity with acids • tendency to rust

  4. Properties • Chemical change: the identity of one or more substances changes and one or more new substances are formed

  5. Indications of a Chemical Reaction • Giving off heat & light

  6. Indications of a Chemical Reaction • Production of a gas

  7. Indications of a Chemical Reaction • Formation of a precipitate

  8. Indications of a chemical reaction • Change in color. (sumac leaves change color when chlorophyll is destroyed)

  9. Chemical Symbols and Formulas • Chemical symbols- see periodic table • Represent elements (made of atoms of one element) • Example: Al, Na, Pb • Chemical formulas- represent compounds • Compounds- made from chemical combination of elements • Example: NaCl, C6H12O6

  10. Symbols and Formulas • Name the number and type of atoms in AgNO3 (NH4)2CO3 H2O

  11. Chemical Equation • Reactants  Products • Example: H2 + O2  H2O Hydrogen and oxygen make water

  12. The Chemical Elements • Metals: most of the elements on the periodic table • hard and shiny • conductive • malleable • ductile • Examples: iron, tin, zinc and copper

  13. The Chemical Elements • Nonmetals: • generally gases or brittle solids • nonconductive • Examples: carbon and oxygen

  14. The Chemical Elements • Metalloids: elements with properties of both metals and nonmetals • Found on the “stair step line” • silicon and germanium

  15. The Periodic Table

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