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Date: 19-10-2018
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Date: 30-12-2018
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Date: 11-1-2019
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Unlike metals forming ionic bonds with nonmetals, hydrogen forms polar covalent bonds. Despite being electropositive like the active metals that form ionic bonds with nonmetals, hydrogen is much less electropositive than the active metals, and forms covalent bonds.
Hydrogen + Halogen → Hydrogen Halide
Hydrogen gas reacting with oxygen to produce water and a large amount of heat:
Hydrogen + Oxygen → Water
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دراسة تحدد أفضل 4 وجبات صحية.. وأخطرها
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العتبة العباسية تستعدّ لتكريم عددٍ من الطالبات المرتديات للعباءة الزينبية في جامعات كركوك
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