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books رقم ذري 33

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الرقم الذري 33 (Info)


الَّرَقَم الذَّرِّي 33:- a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar (Arabic WordNet)