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3) Bond angle 4) Number of bonded atoms. 5) Molecular geometry. NH3 Electron Geometry. Expert Answer 100% (5 ratings) Previous question Next question Get more help from Chegg. Question options: trigonal planar, trigonal planar tetrahedral, tetrahedral tetrahedral, trigonal planar tetrahedral, trigonal pyramidal tetrahedral, bent. The letter A is used to represent the central atom, X represents bonding pairs of electrons between the central atom and another atom, and E represents lone pairs. This is the “Valence Shell Electron Pair Repulsion” (VSEPR) Theory. 2. 6) Polar or nonpolar For the following formula: H2O SBr2 NCI3 CBr4 SO3 CO2 NO3 CHCI3 First of all, let’s start with the basics. I Need: 1) Total number of electron groups. In this article, you will get the entire information regarding the molecular geometry of NH3 like its Lewis structure, electron geometry, hybridization, bond angles, and molecular shape. Lewis Structure. Thus, the “Electron Group” geometry of each central atom in a structure can be determined by simply counting the number of “groups” of electrons around the atom, then considering how those groups would arrange themselves to be as far apart as possible. Assuming you mean the ion Azide (N[math]_{3}^{-}[/math]), 3 Nitrogens and a negative charge give 16 electrons total. In BH*3* this is 3, 3 B-H bonds. 2) Electron geometry. Trigonal Bipyramidal Seesaw Bond Angle: 90°, 120°, 180° (SF₄) As shown in Figure \(\PageIndex{2}\), repulsions are minimized by placing the groups in the corners of a tetrahedron with bond angles of 109.5°. Trigonal Bipyramidal Trigonal Bipyramidal Bond Angle: 90°, 120°, 180° (PCl₅) Number of Electron Groups: 5 Number of Lone Pairs: 1. Total number of electron groups means the number of bonds and lone pairs around the central atom, but counting double and triple bonds as 1 "electron group". What is the electron and molecular geometry of NI3? 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