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Date: 11-3-2017
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Date: 29-6-2020
855
Date: 17-1-2018
1186
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An example of trigonal planar electron pair geometry and molecular geometry is BH3. This molecule is electron deficient and does not follow the octet rule because it has only 6 valence electrons. The hydrogen atoms are as far apart as possible at 120o. This is trigonal planar geometry. The molecule all in a plane and is two dimensional.This molecule exists in a gaseous state in only minute quantities under specialized conditions as an intermediate in the making of other boron hydride type molecules.
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إدارة الغذاء والدواء الأميركية تقرّ عقارا جديدا للألزهايمر
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شراء وقود الطائرات المستدام.. "الدفع" من جيب المسافر
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بالصور: فرش صحن مرقد الإمام الحسين (ع) بالكاربت الاحمر استعدادا لمراسيم عاشوراء
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