کنکور زیست و شیمی تبریز
تقویتی و کنکور زیست شناسی و شیمی تبریز
- اگر در مولکولی تمامی پیوندها ناقطبی باشند (اختلاف الکترونگاتیوی کمتر از 0.4) و اتم مرکزی جفت الکترون ناپیوندی نداشته باشد، مولکول ناقطبی است.
- اگر در مولکولی برآیند جهتگیریهای قطبیت پیوندهای قطبی همدیگر را خنثی کنند و اتم مرکزی جفت الکترون ناپیوندی نداشته باشد، مولکول ناقطبی است.
- همه مولکولهای متقارن، ناقطبی هستند.
مولکول متقارن مولکولی است که اطراف اتم مرکزی، اتمهای یکسان قرار بگیرند و اتم مرکزی الکترون ناپیوندی نداشته باشد. مثل: CO2، CH4، BeCl2، SF6
- همه مولکولهای نامتقارن، قطبی هستند.
مولکول نامتقارن مولکولی است که در آن اتمهای اطزاف اتم مرکزی متفاوت باشند و یا اتم مرکزی الکترون ناپیوندی داشته باشد. مثل H2O، PCl3
- همه مولکولهای دو اتمی جور هسته (هم نام) مثل N2، H2، O2 ناقطبی اند.
- همه مولکولهای دو اتمی ناجور هسته (غیر هم نام) مثل HCl، CO، HF قطبی هستند.
- همه هیدروکربنها ناقطبی هستند مثل بنزن (C6H6)، بوتان (C4H10)، هگزان (C6H14)....
تالیف استاد ارزومند - دبیر زیست و شیمی تبریز
نوع مطلب : تقویتی تبریز، تدریس خصوصی تبریز، شیمی، کلاس کنکور تبریز، كنكور شیمی تبریز، تقویتی شیمی تبریز، شیمی دهم، جزوه شیمی،
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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