Chapter1_08a

Chapter1_08a - Chapter 1: A Simple Model for Chemical Bonds...

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Chapter 1: A Simple Model for Chemical Bonds What is organic chemistry? Chemicals were originally classified by their source. INORGANIC ORGANIC from minerals from plants and animals higher melting and boiling lower melting and boiling (salts) most elements C, H, N, O, halogens simpler formulas complex formulas NaCl H 2 O CH 4 C 2 H 6 C 2 H 4 C 2 H 2 C 5 H 10 O Organic Chemistry: The study of the compounds of carbon.
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Simple Atomic Structure nucleus (most of the mass of the atom) protons (positively charged) neutrons (neutral) electrons in shells (orbitals) around the nucleus valence electrons (electrons in outermost shell) control bonding
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Bonding appears to result from the special stability associated with a filled outer shell of electrons. Ionic Bonding: atoms gain or lose electrons Na + Cl Na + Cl + _ Covalent Bonding: atoms share electrons + 4 C H C H H H H Octet Rule: Atoms of the second period need eight electrons in their outer electron shell. (Lewis structure)
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Chapter1_08a - Chapter 1: A Simple Model for Chemical Bonds...

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