What is the VSEPR molecule shape?

The Valence Shell Electron Pair Repulsion (VSEPR) theory is a simple and useful way to predict and rationalize the shapes of molecules. This number (the steric number) defines the electronic shape of the molecule by minimizing repulsion. For example a steric number of three gives a trigonal planar electronic shape.

What are the 4 VSEPR shapes?

The VSEPR model is useful for predicting and visualizing molecular structures. The structures are: linear, trigonal planar, angled, tetrahedral, trigonal pyramidal, trigonal bipyramidal, disphenoidal (seesaw), t-shaped, octahedral, square pyramidal, square planar, and pentagonal bipyramidal.

How can you determine the shape of a molecule with VSEPR?

1. VSEPR Rules:
2. Identify the central atom.
3. Count its valence electrons.
4. Add one electron for each bonding atom.
5. Add or subtract electrons for charge (see Top Tip)
6. Divide the total of these by 2 to find the total.
7. number of electron pairs.
8. Use this number to predict the shape.

What are the 5 basic shapes of molecules?

The VSEPR theory describes five main shapes of simple molecules: linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral.

What is AXE formula?

The “AXE method” of electron counting is commonly used when applying the VSEPR theory. The electron pairs around a central atom are represented by a formula AXnEm, where A represents the central atom and always has an implied subscript one. Each E represents a lone pair of electrons on the central atom.

What is the shape of NH3?

trigonal pyramidal
If there is one lone pair of electrons and three bond pairs the resulting molecular geometry is trigonal pyramidal (e.g. NH3).

What are the 5 VSEPR shapes?

What is a VSEPR name?

The valence-shell electron-pair repulsion (VSEPR) theory states that electron pairs repel each other whether or not they are in bond pairs or in lone pairs. Using the VSEPR theory, the electron bond pairs and lone pairs on the center atom will help us predict the shape of a molecule.

What is the geometric shape of a molecule?

The shape of a molecule, its geometry, is a description of the way the atoms in the molecule occupy space. A diatomic molecule, a molecule composed of only 2 atoms, must always be linear in shape as the centres of the 2 atoms will always be in a straight line.

What are molecular shapes?

Molecular shape is the three dimensional arrangement of atoms in space around a central atom. The molecular formula of a substance does not give an indication of its shape.

What is molecular shape in chemistry?

Molecular Shape The Shape of Molecules. The three dimensional shape or configuration of a molecule is an important characteristic. Isomers. It is necessary to draw structural formulas for organic compounds because in most cases a molecular formula does not uniquely represent a single compound. Resonance. Atomic and Molecular Orbitals.