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: name@email.sc.edu 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 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 Earths 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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