In their crystal lattices, covalent molecules and ionic compounds have a certain arrangement that gives them symmetry.
A point is nothing more than one atom from a certain molecule or an ion that is present in an ionic lattice in a crystal.
Any point in space that can be used as a mirror to reflect any group on a molecule back through it in the opposite direction and obtain an equivalent group is known as a center of symmetry.
A molecule has a center of symmetry when an identical atom is located diametrically opposite and equally away from the center.
