Ch3- part 1

Ch3- part 1 - Chapter 3 - Part 1 Minerals: Building blocks...

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Chapter 3 - Part 1 Minerals: Building blocks of rocks
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Reading assignment this week Read Understanding Earth, Chapter 3, pp. 45-61. Exam 1 - Friday, Sept. 21 covering Chapters 1,9; 2, and 3
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Outline I. Definition of minerals II. Element and compounds A. Atomic structure B. Chemical bonds Ionic bond Covalent bond Van der Waals bond
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III. Rock forming minerals Silicates feldspars, mica, pyroxene, olivine, clay minerals Non-silicates Carbonates, oxides, sulfides, sulfates
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IV. Physical properties of minerals Crystal form Hardness Cleavage Density Color Streak Luster
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Definition of mineral Naturally occurring Crystalline solid substance Inorganic Specific chemical composition Ex. Quartz SiO2
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Minerals in Earth’s crust are composed almost entirely of eight elements Oxygen, O Silicon, Si Aluminum, Al Iron, Fe Magnesium, Mg Calcium, Ca Sodium, Na Potassium, K
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The mineral quartz Chemical composition- SiO2
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Many organisms secret calcite shells such as foraminifera.
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Atom The smallest unit of a chemical element Atom consists of a nucleus surrounded by a could of electrons Nucleus contains protons and neutrons
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Charge and Mass of Proton +1/ 1 amu Neutron 0/ 1 amu Electron -1/ very small Atomic Number (Z)- number of protons= number of extra nuclear electrons for a neutral atom N= number of neutrons Mass Number (A) – atomic weight = Z+N Isotope- Atoms of same Z but different N
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Chemical elements are arranged in the Periodic Table according to mass number
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This note was uploaded on 05/04/2008 for the course GEOL 1001 taught by Professor Baksi during the Fall '07 term at LSU.

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Ch3- part 1 - Chapter 3 - Part 1 Minerals: Building blocks...

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