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1372 Lec 06SEP11 - 1 General Chemistry 4th edition Hill...

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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 1
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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 2 Orbital Energy Diagrams Subshells within a shell are at the same energy level in hydrogen: 2 s = 2 p. Subshells are split in a multielectron atom: 2 s < 2 p.
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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 3
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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 4 The Modern Periodic Table
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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 5 An electron configuration describes the distribution of electrons among the various orbitals in the atom. Electron configuration is represented in two ways. Electron Configurations The spdf notation uses numbers to designate a principal shell and letters ( s, p, d, f ) to identify a subshell; a superscript indicates the number of electrons in a designated subshell.
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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 6 In an orbital (box) diagram a box represents each orbital within subshells, and arrows represent electrons. The arrows’ directions represent electron spins; opposing spins are paired. Electron Configurations N:
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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 7
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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 8 Electrons ordinarily occupy orbitals of the lowest energy available.
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