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What is the difference between Electron Geometry and Molecular Geometry and explain the circumstances under which they will not be the same?

Check the link, it is a sheet describing the different types of electron and molecular geometry. It helped me a lot. ^^ electron pair geometry and molecular geometry won't be the same if there are lone pairs involved.


How do you determine the molecular geometry of a molecule?

The molecular geometry of a molecule can be determined using the VSEPR theory. VSEPR (Valence Shell Electron Pair Repulsion) Theory: The basic premise of this simple theory is that electron pairs (bonding and nonbonding) repel one another; so the electron pairs will adopt a geometry about an atom that minimizes these repulsions. Use the method below to determine the molecular geometry about an atom. Write the Lewis dot structure for the molecule. Count the number of things (atoms, groups of atoms, and lone pairs of electrons) that are directly attached to the central atom (the atom of interest) to determine the overall (electronic) geometry of the molecule. Now ignore the lone pairs of electrons to get the molecular geometry of the molecule. The molecular geometry describes the arrangement of the atoms only and not the lone pairs of electrons. If there are no lone pairs in the molecule, then the overall geometry and the molecular geometry are the same. If the overall geometry is tetrahedral, then there are three possibilities for the molecular geometry; if it is trigonal planar, there are two possibilities; and if it is linear, the molecular geometry must also be linear. The diagram below illustrates the relationship between overall (electronic) and molecular geometries. To view the geometry in greater detail, simply click on that geometry in the graphic below. Although there are many, many different geometries that molecules adopt, we are only concerned with the five shown below.


Molecular shape of PH3?

PH3 has 3 bonding pairs and 1 non-bonding pair of electrons. Its electron pair geometry is Tetrahedral and its molecular geometry is Trigonal Pyramidal.


What is the molecular geometry of a methane (CH4) molecule?

Methane has a tetrahedral molecular geometry. It has 4 bonding pairs of electrons and no lone pairs.


What is the electron domain geometry of BrF3?

Octahedral is the edcc geometry and the molecular geometry is square pyramidal


What is the molecular geometry of SCl6?

The molecular geometry is octahedral.


What is the molecular geometry of C2H2Br2?

The molecular geometry of C2H2Br2 is trigonal planar.The molecular geometry of C2H2Br2 is trigonal planar.


What describes the molecular geometry of a molecule with four electron groups with only bonded pairs?

trigonal planar


What is the molecular geometry of secl2?

The molecular geometry of secl2 is BENT.


What is the molecular geometry of HClO?

The molecular geometry of HClO is bent.


What is the molecular geometry of N2O2?

The molecular geometry of N2O2 is linear.


How does the lone pair contributes to molecular shape?

The lone pair repels the electrons of the adjacent bonds more so than does a bonding pair of electrons, so thus alters the molecular geometry of the molecule.