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Date: 29-12-2016
1048
Date: 17-4-2019
860
Date: 16-7-2017
1220
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In network solids, conventional chemical bonds hold the chemical subunits together. The bonding between chemical subunits, however, is identical to that within the subunits, resulting in a continuous network of chemical bonds. One common examples of network solids are diamond (a form of pure carbon) Carbon exists as a pure element at room temperature in three different forms: graphite (the most stable form), diamond, and fullerene.
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دراسة: طريقة قيادة السيارة قد تكشف عن مرض نفسي لدى السائق
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بتكنولوجيا خاصة.. إنتاج حرير روسي عالي الجودة
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شاهد بالصور مراحل انجاز جديدة يدخلها مشروع صحن العقيلة زينب (ع)
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