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

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Hoes van 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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Taal Arabisch ● Formaat EPUB ● Pagina’s 91 ● ISBN 9785269618487 ● Bestandsgrootte 0.8 MB ● Leeftijd 99-17 jaar ● Uitgeverij وكالة الصحافة العربية ● Stad London ● Land GB ● Gepubliceerd 2024 ● Downloadbare 24 maanden ● Valuta EUR ● ID 10089033 ● Kopieerbeveiliging Sociale DRM

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