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Frequently Asked Question
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Explain why different geometries have a different amount of planes
Accepted Answer
The number of planes of symmetry in a molecule depends on its geometry. Here's a breakdown:
Planar Molecules: These molecules, like benzene, have a single plane of symmetry that bisects the molecule. Any point on one side of the plane has a mirror image on the other side.
Tetrahedral Molecules: Molecules with a tetrahedral geometry, like methane, have four planes of symmetry. These planes pass through the central atom and two atoms on opposite sides of the molecule.
Linear Molecules: Linear molecules, like carbon dioxide, have an infinite number of planes of symmetry. Any plane that contains the molecule's axis will be a plane of symmetry.
Other Geometries: The number of planes of symmetry can vary based on the specific geometry. For example, a trigonal planar molecule has three planes of symmetry, while a square planar molecule has four.
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