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احصل على السعرالحصول على الاقتباسWhatsAppSelenium is a chemical element with the symbol Se and atomic number 34. It is a nonmetal with Computer Systems Architecture: A Networking Approach. Prentice Hall. pp. 547–548. ISBN 978-0-321-34079-5 . ^ Diels, Jean-Claude; Arissian, Ladan (2011).
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احصل على السعرالحصول على الاقتباسWhatsAppElement Selenium (Se), Group 16, Atomic Number 34, p-block, Mass 78.971. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and
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