Chemistry 121, Week 6 Notes
Chemistry 121, Week 6 Notes 121
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This 2 page Class Notes was uploaded by Brigette Honaker on Friday October 14, 2016. The Class Notes belongs to 121 at University of North Dakota taught by Dr. David Pierce in Fall 2016. Since its upload, it has received 4 views. For similar materials see General Chemistry I in Chemistry at University of North Dakota.
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Date Created: 10/14/16
Week Six Wednesday, September 28, 2016 3:05 PM September 26th, 2016 Electron Configurations of Ions (3.3) Cations o Remove the outermost electron in order p, s, then d Anions o Add electrons to reach the next noble gas configuration Main group ions reach noble gas configuration Periodic Variations of Properties (2.14) Atomic radii o As atomic number increases, atomic radii get smaller o 1st diagonal trend Ionic radii o Cations get smaller, anions get larger o 2nd diagonal trend September 28th, 2016 Ionization Energy (3.5) Ionization energy: the energy absorbed to removed electrons from an atom Ionization: removal of electrons Multiple levels of ionization energies o 1st IE < 2nd IE < 3rd IE … o Every time you remove an electron from an atom, the charge becomes more positive, making it more difficult to remove more electrons Electron Affinity (3.7) Energy released to add electrons Opposite of ionization energy September 30th, 2016 Ionic Bonding (3.8) The transfer of valence electrons Octet Rule o Main group atoms reach octet of electrons to bond o Ionization requires energy, capture releases energy Lattice Energy (3.10) Lattice energy gives ionic compounds their stability Affects solubility Periodic Properties (3.11) 1A elements have the lowest first ionization energy 7A elements have the highest first electron affinity 8A elements are not inert
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