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Chemistry

Chemistry. Chapter 3 Notes #1. States of Matter. Be able to describe solid, liquid, and gases in terms of shape, volume, and particle arrangement!. Matter. All samples of matter are composed of atoms … The smallest particles possessing the properties of an element

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Chemistry

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  1. Chemistry Chapter 3 Notes #1

  2. States of Matter • Be able to describe solid, liquid, and gases in terms of shape, volume, and particle arrangement!

  3. Matter • All samples of matter are composed of atoms… • The smallest particles possessing the properties of an element • Fundamental chemical substances from which all other substances are made

  4. Physical Properties • Characteristics of a material that can be observed or measured without changing the samples composition • Examples: color, odor, taste, density, melting point, boiling point, etc. • Extensive Physical Properties – depends on how much of a sample you have (ex. Mass) • Intensive – doesn’t matter how much of a sample you have (ex. m.p., b.p., density)

  5. Chemical Properties • Characteristics that describe how a substance interacts, or fails to interact, with other substances to form new substances • For example hydrogen has the potential to ignite and explode given the right conditions.

  6. Physical Change • A change in which the composition and chemical properties of a substance are not changed • Ex. Grinding, Breaking, melting, boiling • ALL changes of state are physical changes!!!!!!

  7. Chemical Changes • Change in the composition and properties of a substance, or substances, as the result of a chemical reaction. • Ex. Souring of Milk • Ex. Rusting of iron • Ex. Change in color • Burning./Combustion

  8. Law of Conservation of Mass • Mass is not created nor destroyed • Mass reactants = mass products • Example • Water breaks down into Hydrogen and Oxygen 2H2O = 2H2 + O2 36g = 4 g + 32 g • The End 

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