CHEM 111 Lecture Notes - Electron Configuration, Noble Gas, Carbon Group

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10 Mar 2014
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Take note of similar configurations within a group. All have one electron in their outermost shell. All have 4 electrons in their outermost shell. Their common configurations similar reactivity, give the reason for the periodicity seen among the elements. S block vs. p block vs. d block vs. f block. [kr] 3d104s24p2 (wrong noble gas & wrong order) Result: sets of half filled or filled orbitals are particularly stable. These are the f block elements l value = 3 ml = -3, -2, -1, 0, +1, +2, +3 (7 total orbitals) Inner (core) electrons can be condensed using noble gas terms, fill the orbitals lowest in energy, not used in bonding. Outer electrons those in the outer most shell (highest n value) Valence electrons for main group elements same as outer electrons, for transition elements these may include d electrons as well, used in bonding.