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Unformatted text preview: OUTLINES FOR BIOLOGY 1201 Section 002 Fall 2008 DR. STEVEN POMARICO 1B CHAPTER 2 CHEMICAL CONTEXT OF LIFE Atomic Structure: SPONCH and the Atom - 2.1.1 An understanding of chemistry is important because an interaction between atoms is one of the lowest levels of biological organization. matter mass t element o Approximately 25 of the elements are essential for life. Of those the most biologically important by percentage are (see table 2.1): S = sulfur -- P = phosphorous = oxygen N = nitrogen About 98 C = carbon H = hydrogen ------ K = potassium ------ Ca = calcium Na = sodium Remaining 2% Cl = chlorine Mg = magnesium Trace elements ---- Trace elements atom CHARACTERISTICS OF ATOMS >>>>>Atoms are made up of subatomic particles. The 3 most stable subatomic particles are: neutrons, protons, and electrons. (see fig 2.5) --- Protons --- Neutrons --- Electrons --- Dalton is a mass unit for subatomic particles. 1 Dalton = 1.67 x 10-24 g...
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This note was uploaded on 08/29/2010 for the course BIOL 1201 taught by Professor Wishtichusen during the Fall '07 term at LSU.
- Fall '07