X α valence orbital energy and the density of effective bond charge)was explored.

By using the energy of va1ence orbits in the neutra1 atom and princip1es of e1ectronegativity equa1ization,a new formu1a for the ca1cu1ation of neutra1 group e1ectronegativities has been obtained: G= Π m j=1 [ Π n i=1 (-E i) n i Σ n ] m j Σ m  The group e1ectronegativities for 258 common neutra1 groups have been ca1cu1ated.

It　is　found　that　the　average　values　of　average　energy　of　valence　orbits　parameters　defined　either　as　an　average　of　energy　of　valence　orbit　for　cations　and　anions　taken　together　or　as　the　difference　between　the　averages　of　energy　of　valence　orbit　for　cations　and　anions　taken　separately　concentrate　in　a　narrow　range　for　about　60　superconducting　copper　oxides.

The criterion shows that the average values of average energy of valence orbits of atom of all the oxide superconductors concentrate in a narrow range from -12.

Correlativity between the topological index ~mE of valence electron orbit energy and the acidity of inorganic hydrides

The point value δi of Randic topological index was modified and topological index mE of valence electron orbit energy was thereby formed for predicting physicochemical properties of inorganic compounds.

Using the valence electron orbit energy (E i) and number of valence electron shell (n i), a new connectivity topological index (mV) was proposed from δ i.

In this paper, an equation is obtained through researching the reqularity of the vibrational frequency of the Chemical bond A-H by using the average nuclear potential of the valence electrons and the average energy of valence orbitals.

A formula to show the relationship between tlie vibrational frequency V_(X-H)and the bondlength, the average energy of valence orbitals is suggested in the present paper:The formula has been used to calculate the vibrational frequcency V_(X-H) of some familiar covalent molecular hydrides.