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د.محمود الشواربي
الذرة في خدمة الزراعة [EPUB ebook]

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Couverture du د.محمود الشواربي: الذرة في خدمة الزراعة (ePUB)

تتكون المواد من جزيئات، وتتكون الجزيئات من عناصر، والعناصر من ذرات، وعلى هذا يمكن القول بأن الذرة هي وحدة العنصر ، وتتكون الذرة من نواة ( ( Nucleusيتركز فيها وزن الذرة، ويدور حول هذه النواة في محيطات خارجية عدد من الإلكترونات، التي يعتبر وزنها ضئيلا جدا بالنسبة إلى وزن نواة الذرة، وهذه الإلكترونات جميعا محملة بشحنة سالبة.
وتتكون نواة الذرة من عدد من البروتونات ( (Protons) وعدد من النيوترونات (Neutrons ) والبروتون هو جسيم صغير ثقيل نسبيا، محمَل بشحنة كهربائية موجبة، وأما النيوترون فيبلغ وزنه تقريبا وزن البروتون وهو متعادل كهربائياً، وذرة الأيدروجين تعتبر أبسط الذرات، وتتكون من بروتون واحد، وفي محيطها الخارجي إلكترون واحد.

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Langue Arabe ● Format EPUB ● Pages 91 ● ISBN 9785269618487 ● Taille du fichier 0.8 MB ● Âge 99-17 ans ● Maison d’édition وكالة الصحافة العربية ● Lieu London ● Pays GB ● Publié 2024 ● Téléchargeable 24 mois ● Devise EUR ● ID 10089033 ● Protection contre la copie DRM sociale

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