Atoms, Elements, and Minerals

Atoms, Elements, and Minerals - Minerals are an ordered...

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Minerals are an ordered arangement of atoms Rocks are built out of minerals Elements are the fundamental substances that cannot be broken down into other substances Each atom contains a nucleus surrounded by a cloud of electrons. Particles called protons & neutrons Atomic weight = protons + neutrons The atomic number of an atom = number of its protons (constant) Isotopes are varieties of elements that differ by the number of the neutrons in the nucleus Many elements have a number of isotopes. Some are stable and some radioactive. Over 100 different elements Elements Chemical Composition of the Crust O (Oxygen) 46.6 wt% Si (Silicon) 27.7 Al 8.1 Fe (Iron) 5.0 Ca 3.6 Na 2.8 K 2.6 Mg 2.1 All others 1.7 Total 100% Silicon-Oxygen Tetrahedron (SiO4) Building block of most minerals on Earth Often combined with a metal Silica: relatively low density (it's light!) Light in color, not magnetic.
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This note was uploaded on 04/09/2008 for the course GEOL 1030 taught by Professor Abolins during the Fall '08 term at Middle Tennessee State University.

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Atoms, Elements, and Minerals - Minerals are an ordered...

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