From the above data can predict about the Crystal network of substances in the solid state as follows:a) all EX4 are the molecular networks because of the low increased gradually and, Ts Tnc due to increased molecular weight.SnF4 and PbF4 b) melting temperature, boiling temperature abnormal high proves they have the structure of the polymer, while the remaining EX4, molecular network structure for Bc, Dr. low and gradually increasing the molecular weight increases.c) and EF4 structured ECl4 Only the island as is a gas at temperatures that often, the remaining substance must have a polymer structure.d) in the solid state, Ge, Sn, Pb have deployed number 4, located in the center of the four diệnEX4.
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