کنکور زیست و شیمی تبریز
تقویتی و کنکور زیست شناسی و شیمی تبریز
1.پیوند فلزهای گروه 1و2(البته بجزBe)رابانافلزهاویونهای چنداتمی ازنوع یونی است.
2.بریلیم وبورهیچگاه هیچگاه پیوندیونی تشکیل نمیدهند زیراشعاع بریلیم+2وبور +3بسیارکوچک بوده وچگالی بارسطحی آن بیش ازحدزیاداست به همین دلیل این یونهاناپایدار ودرحالت طبیعی تشکیل نمیشوند.
3.پیوند بریلیم وبور باسایر عنصرهابیشتر خصلت کوالانسی دارد.مثال
چگالی بارسطحی آلومینیوم+3نسبتا زیاد وبه راحتیم تشکیل نمیشود.
4.آلومینیوم +3 فقط در ترکیب فلوئور،اکسیژن وبرخی بنیان های اکسیژن دارتشکیل پیوند یونی میدهد.مانند(Al2O3).ودرسایر موارد مانند(AlCl3)پیوندآن ازنوع کوالانسی.
5.هرچه اختلاف الکترونگاتیوی بین دواتم بیشترباشد خصلت یونی نیز بیشتر است.
6.ترکیب هایی که دارای بنیان آمونیوم هستند،یونی محسوب میشوند مانند(NH4Cl)
نوع مطلب : جزوه شیمی، کلاس کنکور تبریز، شیمی، تقویتی تبریز، تدریس خصوصی تبریز، كنكور شیمی تبریز، تقویتی شیمی تبریز،
لینک های مرتبط :
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تقویتی و كنكور زیست شناسی و شیمی
آموزش با بالارتین كیفیت
و مناسب ترین قیمیت
زیست و شیمی خود را برای مدرسه و كنكور بیمه كنید
مدیر وبلاگ : صمد آرزومند