Unit%202%20Matter

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Unit 2 Matter

• Lesson 1

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Compounds and Mixtures
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Classifying Matter
Matter
Pure Substances
Mixtures
Homogeneous
Heterogeneous
Elements
Compounds
Rocky Road ice cream, muddy water, smog
Kool-aid, air, brass
Fe, O2
H2O, CO2
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What is a Pure Substance?

• A pure substance is a classification of matter
  that includes both elements and compounds
• Pure substances cannot be separated by physical
  means such as distillation, filtration, or
  chromatography.

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What is an Element?

• An element is a form of matter made only of one
  type of atom
• Ex Oxygen , carbon, nitrogen, gold
• Found on the periodic table

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What Is A Compound?

• A compound is a pure substance that is created by
  2 or more elements chemically reacting and
  bonding together
• Ex NaCl, H2O, CO2, NH3, NaHCO3, and C6H12O6
• Notice that elements combine in many ways to make
  compounds
• Ex H2O, H2O2, CO, and CO2

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What Is A Mixture?

• A mixture is the physical combination of 2 or
  more substances
• It is important to understand that a mixture is
  not chemically combined
• Mixtures can be separated by physical means such
  as filtration, distillation, and chromatography
• Mixtures can be divided into 2 groups
• Homogenous mixtures
• Heterogeneous mixtures

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What Is a Homogenous Mixture?

• A homogeneous mixture is a mixture that is evenly
  distributed. The particles are spread out evenly
  throughout the mixture.
• Homogeneous mixtures are commonly called
  solutions.

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What Is a Heterogeneous Mixture?

• A heterogeneous mixture is a mixture that is
  unevenly distributed
• Examples
• Iced tea The ice is floating at the top and
  therefore is not evenly distributed throughout
  the tea
• Chex Mix You may find a different number of
  pretzels or Chex cereal in each handful
  therefore, the mixture is unevenly distributed