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Classification of Matter

Classification of Matter

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Classification of Matter

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  1. Classification of Matter

  2. What is classification? • Classify the following things into two classes: • Dog • Cat • Dolphin • Whale • Tuna • Shark • Tiger • Human

  3. Classification in Chemistry • Chemistry focuses on matter and its interactions • We rely on knowing how matter is classified to tell us about its properties

  4. Types of Properties • Extensive Properties: a property that changes when the size of the sample changes • Ex: mass volume

  5. Types of Properties • Intensive Properties: Properties that remain constant independent of the amount of sample present • Ex: melting point hardness density

  6. Self Check • Determine if each of the following is an extensive or intensive property • Smell • Density • Length • Luster • Malleability

  7. Matter • Anything that has mass, and takes up space! • Everything is matter! • Matter can be broken down into two classes: • Mixtures • Pure substances

  8. Pure Substance • Form of matter that cannot be separated by physical means • Can be broken down into: • Elements • Compounds

  9. Elements • A pure substances that cannot be further decomposed (broken down) by ordinary chemical methods • Elements are made of all of the same type of atoms • These are what make up the periodic table • Examples • Oxygen (O) • Gold (Au) • Iron (Fe)

  10. Compounds • Compound • can be decomposed (broken down) into two or more simpler substances (elements) by ordinary chemical means • Compounds are made of multiple elements • Properties of a compound are usually different from the properties of the elements that make it up • Examples (usually given formula) • Water (H2O) • Sodium Chloride (NaCl)

  11. Classes of Matter cont. • Mixture • Two or more substances physically mixed together • A mixture generally has the same properties as the substances that make it up • Can be broken down into: • Homogenous Mixture • Heterogeneous Mixture

  12. Mixtures Ctd • Homogeneous Mixture • Homo = same • Also called a solution • Homogeneous mixture has the same properties throughout • Parts are not visible • Examples? • Salt water • Kool Aid

  13. Mixtures Ctd • Heterogeneous Mixture • Hetero = different • Heterogeneous mixture has different properties throughout • Parts are visible • Examples? • Fruit salad • Vegetable Soup

  14. Matter Flow Chart • Make a flow chart, starting with matter, that helps to explain how matter is classified • Terms that must be on map (include an example of each as well): • Matter, mixture, pure substance, element, compound, homogenous mixture, heterogeneous mixture, solution

  15. Classify the Following using Flow Chart • Lead (Pb) • Iced Tea • Milk • Dirt • Silver (Ag) • Rocky Road Ice Cream • Snickers Bar • Gatorade • Hydrogen Peroxide (H202) • Nachos • Water Vapor (H20) • Gravel • Wood • Sugar (C6H12O6)

  16. Classify the Following using Flow Chart • Nickel (Ni) • Chocolate Milk • Pizza • Beach • Salt (NaCl) • Trail Mix • Glue • Salsa • Coffee • Spaghetti • Water • Vegetable Oil • Gas (CH4) • Sugar (C6H12O6)