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Chemistry Mod 1

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  1. 1. CHEMISTRY <ul><li>MODULE ONE- composition, structure, and behavior of matter. </li></ul>
  2. 2. <ul><li>Chemistry is the science that investigates and explains the structure and properties of matter. </li></ul>Composition, Structure, and Behavior Chemistry <ul><li>Matter is the stuff that’s all around you: the metal and plastic of a telephone, the paper and ink of a book, the glass and liquid of a bottle of soda, the air you breathe, and the materials that make up your body. </li></ul><ul><li>A more formal definition of matter is anything that takes up space and has mass. </li></ul>1
  3. 3. <ul><li>Mass is the measure of the amount of matter that an object contains. </li></ul>Composition, Structure, and Behavior <ul><li>The structure of matter refers to its composition—what matter is made of—as well as how matter is organized. </li></ul><ul><li>The properties of matter describe the characteristics and behavior of matter, including the changes that matter undergoes. </li></ul>1 Chemistry
  4. 4. <ul><li>Matter that is large enough to be seen is called macroscopic, so all of your observations in chemistry, and everywhere else, start from this perspective. </li></ul>Macroscopic View of Matter <ul><li>You may get hints of the actual structure from a macroscopic view. You must go to a submicroscopic perspective to understand how the hidden structure of matter influences its behavior. </li></ul>1 Chemistry
  5. 5. <ul><li>The submicroscopic view gives you a glimpse into the world of atoms. </li></ul>Submicroscopic View of Matter <ul><li>It is a world so small that you cannot see it even with the most powerful microscope, hence the term sub microscopic. </li></ul><ul><li>Microscopic: where does that fit? </li></ul>1 Chemistry
  6. 6. Using Models in Chemistry <ul><li>Sucrose and aspirin are both composed of carbon, hydrogen, and oxygen atoms, but they have different behaviors and functions. </li></ul><ul><li>These differences must come about because of differences in the submicroscopic arrangement of their atoms. </li></ul>1 Chemistry
  7. 7. Comparing the Structures of Aspirin and Sucrose <ul><li>The different submicroscopic arrangements of the atoms in aspirin and sucrose cause the differences in their behavior. </li></ul>1 Chemistry aspirin sucrose
  8. 8. Using Models in Chemistry 1 Chemistry <ul><li>A scientific model is a thinking device that helps you understand and explain macroscopic observations. You are going to build a model of biodiesel and petro-diesel and other molecules. </li></ul>
  9. 9. <ul><li>Unlike pure substances, mixtures do not have specific compositions. </li></ul>1 Chemistry Pure substance or a mixture? <ul><li>A mixture is a combination of two or more substances in which the basic identity of each </li></ul>substance is not changed.
  10. 10. <ul><li>A physical change is a change in matter that does not involve a change in the chemical identity of individual substances. </li></ul><ul><li>Examples of physical changes include: </li></ul><ul><li>boiling, </li></ul><ul><li>freezing, </li></ul><ul><li>melting, </li></ul><ul><li>evaporating, </li></ul><ul><li>dissolving, </li></ul><ul><li>and crystallizing. </li></ul>1 Chemistry Pure substance or a mixture?
  11. 11. <ul><li>Examples of the physical properties of a chunk of matter include its: </li></ul><ul><li>solubility, </li></ul><ul><li>melting point, </li></ul><ul><li>boiling point, </li></ul><ul><li>color, </li></ul><ul><li>density, </li></ul><ul><li>electrical conductivity, </li></ul><ul><li>and physical state (solid, liquid, or gas). </li></ul>1 Chemistry Pure substance or a mixture?
  12. 12. 1 Chemistry Pure substance or a mixture?
  13. 13. CHEMISTRY <ul><li>END OF MODULE 1 </li></ul><ul><li>TAKE TEST ON MODULE 1 </li></ul>1