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Date: 10-12-2018
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Date: 25-11-2018
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Date: 28-3-2017
1038
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Cadmium never occurs in nature in its elemental form. It is always found in a compound with another element. The most common natural compounds of Cadmium are Cadmium Sulfide, Cadmium Carbonate, and Carbon Oxide. Carbon Sulfide, also known as the mineral Greenockite, is the most well known source of Cadmium. Cadmium is also found in the Earth's Crust in amounts of about 0.1 to .2 ppm, a very smallamount. Most of the Cadmium that is obtained is through a process known as Zinc refinement, which uses their differing melting points.
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تفوقت في الاختبار على الجميع.. فاكهة "خارقة" في عالم التغذية
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أمين عام أوبك: النفط الخام والغاز الطبيعي "هبة من الله"
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المجمع العلمي ينظّم ندوة حوارية حول مفهوم العولمة الرقمية في بابل
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