ABSTRACT
A molecule consists of an assembly of symmetry operations. All the symmetry elements possessed by any molecule, pass through a fixed point in the molecule and this point do not change its position during any operations. Therefore, all the operations generated by symmetry elements is said to form a symmetry or point group. It means point group is a symbol, which represents symmetry elements present in that molecule. The fixed-point group is also a group in its mathematical sense. Hence, it must also satisfy the necessary characteristics of a group in general.
