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Chapter_10_Part_2 - Chapter 10 Molecular Geometry and...

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Chapter 11 Part 2 1 of 3 Chapter 10: Molecular Geometry and Chemical Bonding Theory Part 2 d. Central Atom with Five or Six Valence–Shell Electron Pairs Electron Pair Arrangements Electron Pair Arrangement • five pairs of electrons (regions of electron density) trigonal bipyramidal • six pairs of electrons (regions of electron density) octahedral Molecular Geometry Molecular geometry • five pairs of electrons (regions of electron density) no lone pair of electrons trigonal bipyramidal one lone pair of electrons seesaw two lone pairs of electrons T–shaped three lone pairs of electrons linear • six pairs of electrons (regions of electron density) no lone pair of electrons octahedral one lone pair of electrons square pyramidal two lone pair of electrons square planar
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Chapter 11 Part 2 2 of 3 2. Dipole Moment and Molecular Geometry To understand dipole moment, we need to understand the concept of electronegativity. Electronegativity is a measure of the ability of an atom in a bond to draw bonding electrons to itself. Electronegativity increases from bottom to top in a group and from left
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