Valence shell electron pair repulsion (VSEPR) theory is a model in chemistry, which is used to predict the shape of individual molecules. VSEPR theory is based on the idea that the geometry (shape) of a molecule is mostly determined by repulsion among the pairs of electrons around a central atom.
Considering this, how can we use the Vsepr theory to predict the shape of a molecule?
Molecule shapes can be predicted based on Lewis dot structure using the VSEPR theory. VSEPR stands for Valence Shell Electron Pair Repulsion. It states that electron pairs in the valence shell of an atom repel each other; their molecular geometry is the result of this repulsion.
What is Vsepr theory definition?
Definition: VSEPR is the acronym for Valence Shell Electron Pair Repulsion theory. VESPR is a model used to predict the geometry of molecules based on minimizing the electrostatic repulsion of a molecule's valence electrons around a central atom.
How do you use Vsepr theory to predict the shape of a molecule?
- VSEPR Rules:
- Identify the central atom.
- Count its valence electrons.
- Add one electron for each bonding atom.
- Add or subtract electrons for charge (see Top Tip)
- Divide the total of these by 2 to find the total.
- number of electron pairs.
- Use this number to predict the shape.