Symmetry elements and symmetry point groups

2 videos • 2,494 views • by ChemWis This is a very useful topic from the competitive examination point of view. Better understanding of this topic will enable us to understand group theory as well of spectroscopy. So, let’s first try to under stand what is a symmetry operation. A symmetry operation is an action of rotation or reflection or both that leaves an object in an orientation indistinguishable from the original one. Each molecule has a set of symmetry operations that describes the molecule's overall symmetry. This set of operations define the point group of the molecule.