1_Structure_atom_land

1_Structure_atom_land - Chapter 6 Part 1 Structure of the...

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Mary J. Bojan Chem 110 Chapter 6 Part 1 Structure of the atom What IS the structure of an atom? What are the properties of atoms? REMEMBER: structure affects function! Important questions: Where are the electrons? What is the energy of an electron? Chapter 6 Part 1 Dual Nature of Light !" =c E = h " Line Spectrum Bohr Model of Hydrogen Atom 1
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Why do we start with Chapter 6? Overview of Chem 110 Key themes: structure effects function (properties). How do we know about atoms, etc.? Structure of atom Ch. 6 Properties of Atom Ch. 7 How atoms bond to form molecules Ch. 8 Structure of molecules Ch. 9 Properties of molecules Ch. 10, 11, 13 Molecules REACT! Ch. 3, 4, 10 Rules that govern reactions Thermodynamics (think energy) Ch. 5 Equilibrium Ch. 15 Mary J. Bojan Chem 110 2
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What is the structure of an ATOM? COMPONENTS OF ATOMS mass charge (a.m.u.) (a.u.) proton p electron e neutron n Neutral Ion Mary J. Bojan Chem 110 F 19 9 + K 39 19 3
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ISOTOPES atomic number = ??? DEFINES identity of element For a given element, number of protons is fixed, but number of neutrons can vary. Isotopes: Mary J. Bojan Chem 110 Cl 35 17 Cl 37 17 4
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The Atomic Mass Scale We define: mass of 12 C = exactly 12 amu. Use ISOTOPE RATIOS to find Average Atomic Masses Mary J. Bojan Chem 110 5
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The Atomic Mass Scale Another definition: 1 mole of 12 C has a mass of 12 g What is a mole? 1 mole of anything (atoms, molecules, green peas) = Avogadro’s
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1_Structure_atom_land - Chapter 6 Part 1 Structure of the...

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