CHE 2A Lecture 16: The Shape of Molecules & Molecular Polarity

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22 Mar 2018
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CHE 2A Full Course Notes
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Che2a lecture 16 the shape of molecules; molecular polarity. Molecular shape: geometric figure obtained by joining the nuclei of bonded atoms with straight lines. Bond length: the distance between the nuclei of two bonded atoms, determined by following certain rules or by experiment. Bond angle: angle between adjacent lines that represent bonds, can be found by experiment. Vsepr theory and its key points: valence shell electron pair repulsion (vsepr, key points. It defines the electron group geometry of central atoms. It determines the molecular geometry or shape of the molecule. If the number of electron groups around the central atom is equal to the number of bonded atoms around the central atom, the molecular geometry is of the same type as the electron group geometry. If the number of electron around the central atom is larger than the number of bonded atoms around the central atom, the molecular geometry is different from the electron group geometry.

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