# VSEPR GEOMETRIES VSEPR Geometries 2 lone pairs Steric No. Basic Geometry O lone pair 1 lone...

VSEPR GEOMETRIES  VSEPR Geometries 2 lone pairs Steric No. Basic Geometry O lone pair 1 lone pair 4 lone pair's 3 lone pairs 180° Linear <120 Bent or Angular Planar X Tetrahedral << 109° Beat or Angular <109° Trigonal Pyramid < 90° X XI <120° CE- 120°CX Trigonal Bipyramid Sawbore or Seesaw 190° Wa 2 T 90° * T-shape tabedral Square Pyramid Square Planar
Objectives Be able to draw electron-dot structure (Lewis dot structure) of molecules, including molecules that are octet deficient. Apply the VSEPR model to determine a molecule's electronic geometry and molecular geometry based on its Lewis dot structure. Know the bond angles associated with basic molecular shapes Understand the relationship between dipole moment and molecular geometry, and be able to predict the polarity of molecules

SIMPLEST TRICK TO DETERMINE THE GEOMETRY AND SHAPE TO FIND GEOMETRY AND SHAPE

1. Calculate the valence electron

2. if valence electron count is less than or equal to 8 divides it by 2

if valence electron count is less than or equal to 56 divides it by 8

if valence electron count is greater than or equal to 56 divides it by 18

3. Predict the geometry & shape by using the table given below as provided in the question Order of repulsion : bond pair-bond pair < bond pair-lone pair < lone pair-lone pair

Based on these factors bond angles distorts in a given structure

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