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Chem 201/Beauchamp Topic 1: …
Chem 201/Beauchamp Topic 1: Atoms, bonding , dipoles ,IP 1 Atomic Structure Since molecules are constructed from atoms, we will quickly review the structure of atoms. Volume of electron cloud compared to volume of nucleusVeVn4 3( )( )(100,000)3 = 4 x 1015==electron clouds determine the overall volumeof atomsmass protonsmass electrons18001protons and neutronsdetermine an atom's mass=ecoreevalencep,n1100,000p = protons = constant # that defines the elementn = neutrons = varies = defines the isotopee = electrons = varies, depending on bonding patterns associated termif electrons = protons (same # of e's and p's) atomif electrons < protons (deficiency of e's) cationif electrons > protons (excess of e's) anion(eval)
Chem 201/Beauchamp Topic 1: Atoms,Bonding,Dipoles,IP 2 Effective nuclear charge - Zeffective is the net positive charge felt by the valence electrons (bonding and lone pair electrons). It can be estimated by subtracting the number of …
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