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The purpose of this study is to investigate the negative effects of Wi-Fi routers in houses on human health. As these devices have become an essential part of daily life, they are widely used for communications and the Internet. No house can do without it. The radiation emitted from these routers causes many symptoms, such as heart diseases, sleep disorders, brain tumors, ear hearing problems, male infertility, etc. This study looked at 15 different symptoms that may be caused by the emitted radiation by the routers. A questionnaire was distributed for a large number of medical doctors working in five major hospitals in the city of Najaf, and another for individuals who have routers in their house and who do not. The results showed that Wi-Fi routers have an effect on human health that does not exceed 30%. Individuals with routers have more symptoms than people without Wi-Fi routers. While females are more affected by routers than others.

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In this paper, was used the technique of fragmentation to analyze the systems studied based on the energy of repulsion between electronic pairs. The energy of Hartree - Fock was calculated for the carbon atom (C) and the similar ions (N+1) and (O+2), When the results of the energies compared with the global publications we found a large agreement also studied the atomic properties by using atomic units.