9-6 Basic Scientific Principles Continued

9-6 Basic Scientific Principles Continued - EVS195 Compound...

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EVS 195 16:59 Compound A substance containing two or more elements and held together by bonds Most matter on Earth exists as compounds (not single elements or mixtures) Examples: NaCl- Sodium chloride H 2 O- Water C 6 H 12 O 6 - Glucose Compounds usually don’t share characteristics of the elements that form them 1 Oxygen + 2 Hydrogens = 1 H 2 O Bonds Elements are held together in compounds by atomic bonds Types of Bonds: Ionic bonds- Held together by opposite charges (ions) Na+ + Cl-   NaCl Most compounds are formed by ionic bonds Covalent bonds- Atoms share electrons Types of Compounds Organic Compounds All contain carbon atoms with carbon-hydrogen bonds (carbon-based) Contain elements- C, H, O, N, S, P, Cl, F ;with C-H covalent bond Natural or man-made ORGANIC DOES NOT MEAN LIVING!!! Man-made Organics
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Hydrocarbons- H+C Plastics Chlorinated hydrocarbons- C+H+Cl DDT- C
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Unformatted text preview: 14 H 9 Cl 5 PCB- C 12 H 5 Cl 5 Chlorofluorocarbons- C+H+Cl+F (CFC) Freon- CHCl 2 F 2 Natural Organics Hydrocarbons- H+C Crude oil and natural gas Carbohydrates Simple Glucose- C 6 H 12 O 6 Complex Linked sugars Proteins Nucleic acids- DNA and RN Genes Chromosomes Inorganic Compounds May contain carbon, but not C-H Example: NaCl, CO, CO 2 , NH 3 (ammonia) All minerals and rocks, many components of the atmosphere and hydrosphere Mixtures Mixtures are physical not chemical combinations of elements and compounds Seawater Atmosphere Matter as a Resource Matter quality- measure of how useful matter is as a resource High Quality Matter Concentrated Near Earth’s surface Potential to be used as a resource Low Quality Matter Dilute Deep underground/dispersed in the atmosphere or ocean Little potential as a resource 16:59 16:59...
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  • Spring '08
  • HALL
  • DNA, CFC, H+CPlastics, C6H12O6­ Glucose Compounds

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