ISB 202 Lecture 4 - ISB 202 Lecture 4 Applications of...

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ISB 202 Lecture 4 17/01/2008 10:30:00 Applications of Environmental and Organismal Biology Chemistry for Life This forest has been destroyed by acid rain Understanding acid rain starts with knowing a bit about the basic building  blocks of nature Chemistry underlies al biology Atomic Structure All atoms have the same basic structure  o Protons (+ charge) o Neutrons ( no charge) o Electrons (- charge) Atomic number is number of protons o Also called atomic mass Electrons Determine How Molecules Interact Electrons are on the periphery of the atom, far from the nucleus, and have  little mass Yet they are the parts of the atom that interact with other atoms in chemical  reactions Chemical reactions involve the sharing or transfer of electrons Electrons Have Energy Electrons orbit the nucleus with different levels of potential energy, the greater  the potential energy of the electron, the greater the distance from the nucleus The energy of electrons is called potential energy, because the energy is  potentially used (is available) for chemical reactions Energy added to molecules increase the potential energy of electrons and 
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This note was uploaded on 04/28/2008 for the course ISB 202 taught by Professor Johnson during the Spring '08 term at Michigan State University.

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ISB 202 Lecture 4 - ISB 202 Lecture 4 Applications of...

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