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Date: 14-12-2018
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Date: 13-11-2018
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Date: 24-10-2018
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Oxygen is an element that is widely known by the general public because of the large role it plays in sustaining life. Without oxygen, animals would be unable to breathe and would consequently die. Oxygen is not only important to supporting life, but plays an important role in many other chemical reactions. Oxygen is the most common element in the earth's crust and makes up about 20% of the air we breathe. Historically the discovery of oxygen as an element essential for combustion stands at the heart of the phlogiston controversy (see below).
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هل يمكن أن تكون الطماطم مفتاح الوقاية من السرطان؟
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اكتشاف عرائس"غريبة" عمرها 2400 عام على قمة هرم بالسلفادور
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جامعة الكفيل تقيم ندوة علمية عن الاعتماد الأكاديمي في جامعة جابر بن حيّان
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