Chapter 8 Lecture Notes.doc - Chem 1035 Chapter 8 1 of 35 Chapter 8 Electron Configuration and Chemical Periodicity Using the four quantum numbers we

Chapter 8 Lecture Notes.doc - Chem 1035 Chapter 8 1 of 35...

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Chem 1035 Chapter 8 1 of 35 Chapter 8 Electron Configuration and Chemical Periodicity Using the four quantum numbers, we want to distribute an atom’s electrons among the atomic orbitals. The location of an atom’s electrons determine its behavior. Electron Configurations tells where an atom's electrons are (what atomic orbitals) helps us predict chemical reactivity of elements and structures of compounds
Chem 1035 Chapter 8 2 of 35 Where are the electrons in atoms?
Chem 1035 Chapter 8 3 of 35
Chem 1035 Chapter 8 4 of 35 ).
Chem 1035 Chapter 8 5 of 35 The Periodic Table gives the order in which orbitals are filled : rather than memorizing the energy diagram, you can let the periodic table tell you what orbitals to put the electrons in. n for s and p electrons = period number n for d electrons = period number - 1 n for f electrons = period number - 2
Chem 1035 Chapter 8 6 of 35 Electron Configurations and Orbital Diagrams Electron configuration is indicated by a shorthand notation: Orbital diagrams make use of a box, circle, or line for each orbital in the energy level. An arrow is used to represent an electron and its spin. H ───
Chem 1035 Chapter 8 7 of 35 1 e 1s 1 1s He 2 e 1s 2 ─── 1s Li 3 e 1s 2 , 2s 1 ─── ─── 1s 2s Be 4 e 1s 2 , 2s 2 ─── ─── 1s 2s B 5 e 1s 2 , 2s 2 , 2p 1 ─── ─── ─── 2p C 6 e 1s 2 , 2s 2 , 2p 2 ─── ─── ─── 2p N 7 e 1s 2 , 2s 2 , 2p 3 ─── ─── ─── 2p O ─── ─── ─── 2p
Chem 1035 Chapter 8 8 of 35 8 e 1s 2 , 2s 2 , 2p 4 F 9 e 1s 2 , 2s 2 , 2p 5 ─── ─── ─── 2p Ne 10 e 1s 2 , 2s 2 , 2p 6 ─── ─── ─── 2p

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