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Chapter 2 - edited outline

Chapter 2 - edited outline - OUTLINES FOR BIOLOGY 1201...

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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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Chapter 2 - edited outline - OUTLINES FOR BIOLOGY 1201...

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