Due to molecular orbitals' application, CF4 exhibits a symmetry different from CH4. As shown in Fig. , n=8 for a tetrahedron, in addition to 4 rotations of σ bond, thus n= 4 molecule C3×4 F C3 -4 molecule C3 + 3 molecule C2×4 F C3-3 molecule C2 = 22, namely that CF4 has 22 operations, n=22. However, since a fluorine atom is bigger than a carbon atom, in addition to the three big sp 3 orbitals of each fluorine atom, the rotation of the σ bond may be restricted. Something like the synergistic rotation may exist. It may reduce by half the number of operations. Hence, CF4 gives A=4.6377 near M.P., corresponding to n=10. In contrast, SF6 exhibits an excellent symmetry with the average A=4.2976 and D 2 =0.9999, corresponding to n ≥ 9. In the theory of mass symmetry, it is an octahedron consisting of 8 equilateral triangles formed by the d 2 sp 3 hybridized orbitals of a sulfur atom. However, according to the theory of this paper, for the best status, it should be a regular tetradecahedron with three vertices of vacant d orbitals. Accordingly, it is hard to scale the symmetry.