Bio 1510-2 - Please Turn Off Cell Phones for Duration of...

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1 Please Turn Off Cell Phones for Duration of Class Please Close the Door Behind You Use Following Web Site for more resources www.mhhe.com/raven 8 First Exam 09/29/08 First Exam 09/29/08
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Bio – 1510 Basic Life Mechanisms Bio – 1510 Basic Life Mechanisms Fall 2008 Fall 2008 Dr. Rasheeda Zafar Chapter # 2 The Nature of Molecules Matter Atoms, Electrons and Chemical bonds Acids and Bases 2
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Matter Matter Matter Matter Any substance in nature that has a mass and occupies space Physical States of Matter Physical States of Matter Liquids water Solids rock Gases oxygen Plasmas fluorescent light bulb, neon signs 3
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Atoms and Atomic Structure Atoms and Atomic Structure   All matter is composed of atoms Understanding the structure of atoms is critical to understanding the nature of biological molecules. Atoms are composed of Protons – positively charged particles Neutrons – neutral particles Electrons –negatively charged particles Protons and neutrons are located in the nucleus, electrons in orbitals surrounding the nucleus 4
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Atomic Mass and Atomic Number Atomic Mass and Atomic Number Atomic Mass Atomic Mass = The sum of protons and neutrons. Each proton and neutron has a mass of approximately 1 dalton .. Isotopes = Isotopes = Atoms of the same element that have different atomic mass numbers due to different numbers of neutrons. Atomic Number Atomic Number = = Number of protons Every different atom has a characteristic number of protons in the nucleus . Atoms with the same atomic number have the same chemical properties and belong to the same element. 5
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Atomic Charge Atomic Charge Neutral atoms Neutral atoms have the same number of    protons and electrons.
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This note was uploaded on 12/04/2009 for the course BIO 1510 taught by Professor Rodriguez during the Spring '08 term at Wayne State University.

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Bio 1510-2 - Please Turn Off Cell Phones for Duration of...

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