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Date: 25-6-2019
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Grouping atoms with the condensed structural formula
We like the Lewis formula because it enables you to show a lot of information without having to write all those little dots. But it, too, is rather bulky. Sometimes chemists (who are, in general, a lazy lot) use condensed structural formulas to show bonding patterns. They may condense the Lewis formula by omitting the nonbonding electrons (dots) and grouping atoms together and/or by omitting certain dashes (covalent bonds). For instance, condensed formulas often group all the hydrogens bonded to a particular carbon atom. Figure 1-1 shows a couple of condensed formulas for C2H4O.
Figure 1-1: Condensed structural formulas for C2H4O.
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"الرعاية التلطيفية".. تحسين جودة حياة المرضى هي السر
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العلماء الروس يطورون طريقة جديدة لإعادة تدوير النفايات البلاستيكية
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اختتام المراسم التأبينية التي أهدي ثوابها إلى أرواح شهداء المق*ا*و*مة
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