CHEM 1061 1nd Edition Lecture 24 Outline of Last Lecture 1 Transition Elements 2 Ionization Energy a Ionization Energy for Boron and Oxygen b Successive Ionization Energy 3 Electron Affinity 4 Metallic Behavior Outline of Current Lecture 5 Monoatomic Ions 6 Pseudo Noble Gas Configurations 7 Transition Elements 8 Trends in Ionic Size 9 Isoelectronic Ions Current Lecture Monoatomic Ions Main Group Why does an ion have a particular charge 11p 11e Na 1s 2 2s 2 2p 6 3s 1 Lose e low IE 11p 10e Na 1s 2 2s 2 2p 6 Isoelectronic same number of electrons Na Ne Mg2 are isoelectronic all have 10 electrons 82e Pb Xe 6s 2 4f 14 5d 10 6p 2 80e Pb2 Xe 6s 2 4f 14 5d 10 Pseudo Noble Gas Configurations Fill subshells stable 78 e Pb4 Xe 4f 14 5d 10 Remove electrons from the outermost shell These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Transition Elements Remove e with the highest n value first ex remove 4s before 3d 23e V Ar 4s 2 3d 2 20e V3 Ar 3d 2 Diamagnetic no unpaired electrons not attracted to magnetic field can be slightly repelled ex Ar 3d 10 Paramagnetic has unpaired electrons are attracted to a magnetic field ex Mn2 Ar 3d 5 more unpaired more magnetic Trends in Ionic Size cations smaller than parent atoms higher charge pulls electrons in p eAnions larger than parent atom increase shielding and e e repulsions lower Z eff Ex place the following in order of increasing size I Li FLi I FIsoelectronic Ions Same number of electrons Compare the number of protons Largest proton number smallest size Ex O2 F Na Mg2 Mg2 Na F O2
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