Minerals revised

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Unformatted text preview: iClicker Web Registration • Go online to www.iclicker.com • Select register from the menu • Student ID: [email protected] USC email address SPRING 2010 LAB SCHEDULE • Section Day Time Room • 001 Monday 9:05 AM EWS101 • 002 Monday 11:15 AM EWS101 • 003 Monday 1:25 PM EWS101 • 004 Monday 3:35 PM EWS101 • 005 Tuesday 12:30 PM EWS101 • 006 Tuesday 3:30 PM EWS101 • 007 Wednesday 9:05 AM EWS101 • 008 Wednesday 11:15 AM EWS101 • 009 Wednesday 1:25 PM EWS101 • 010 Wednesday 3:35 PM EWS101 • 011 Thursday 12:30 PM EWS101 • 012 Tuesday 12:30 PM EWS104 • 013 Friday 11:15 AM EWS101 • Labs begin on Tuesday, January 19. Lecture Topic #2 Atoms, Elements and Minerals Textbook – Chapter 3 Structure of an Atom 1. Nucleus – dense, central portion of an atom. Contains the following particles: – Protons – positively charged particles – Neutrons – neutrally charged particles 1. Electrons – negatively charged particles that orbit around the nucleus. The total number of protons and electrons determines the electrical charge of the atom Atoms are 0.1-2.0 Å in diameter (Angstrom= 10-8 cm) The carbon atom electron cloud atomic nucleus (N&P) electrons (–) 6 protons (+) 6 neutrons 6,7,8 Classification of Atoms 1. Atomic Number (A#) – number of protons in the nucleus. 2. Atomic Weight (AW) – combined number of protons and neutrons in the nucleus. – electrons have no mass and do not contribute to the AW – neutrons and protons have equal masses 3. Elements – all atoms with the same A# – A# is the unique identifier of each element Periodic Table • Isotopes – different forms of a particular element that have a variable number of neutrons and thus different atomic weights. Example: Oxygen Atomic Number: 8 Atomic Weight: 16, 17 or 18 Due to the fact that atoms of oxygen can have either 8, 9 or 10 neutrons Elemental composition of the Earth’s crust* 1. Oxygen (O) 46.1% 2. Silicon (Si) 27.7% 3. Aluminum (Al) 8.3% 4. Iron (Fe) 5.4% 5. Calcium (Ca) 4.9% 6. Magnesium (Mg) 2.6% 7. Sodium (Na) 2.2% 8. Potassium (K) 1.9% TOTAL ~99% *Crust – outermost layer of the Earth ~74% •...
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This note was uploaded on 06/06/2011 for the course GEOL 101 taught by Professor Knapp during the Spring '08 term at South Carolina.

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