The Atomic Solid Compounds

There are two kinds of combinations where nodal particles can be considered as atoms the crystals of inherent gases and covalent crystals of diamond type. 

In the crystals of inherent gases the cohesion between atoms is given by the van der Waals interaction. The origin of this interaction consists in the fact that the electrons are in movement around the nucleus, even in the lowest energetic state, so even for OK. The electrons movement produces a dipole moment instantaneous non-null, which will induce a dipole moment instantaneous in the neighboring atom and so one. The van der Waals interaction is un-oriented, thereby, in these structures will appear the tendency that an atom will be siuroimded with a maximum number from other atoms. 

In the valence bond paradigm (V.B.) is considered that the covalent bond results through the overlapping of atomic orbital of two atoms having electrons with not compensated spin, see Volume III of the present five-volume set (Putz, 2016) and (Sirotin askolskaia 1981 Becherescu etal., 1983). 

The formation of a covalent bond suppresses the spherieal symmetry of electrons cloud around an atom and, therefore, the bonds resulted will have various directions, exactly oriented in space or not, in other words, particles, covalently bonded by a given partiele, ean occupy only certain positions, strictly determined around it. 

Inter-atomic distances whieh ate established as a result of covalent bond of two atoms are eonstant measures and independently form the aggregation state of the relative substance. 

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