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我们来看一个简单的实验:如图1所示,在玻璃杯中装入半杯黄豆,然后继续装入小米,直到装满玻璃杯。给玻璃杯盖上盖子,晃动玻璃杯。你发现了什么?杯子变得不满了!这是怎么回事呢?原来,黄豆和小米混合后彼此进入对方的间隔中了。我们知道物质是由分子、原子等微粒组成的,当不同物质混合时,会出现类似情况吗?一、分子之间有间隔吗?实验一:酒精和水混合如图2所示,用试管、橡胶塞、玻璃导管组装一套装置。先注入半试管水,然后再注入酒精(事先在酒精中滴加几滴红墨水),快满时塞紧橡胶塞,借助注射器继续加入酒精,
Let’s look at a simple experiment: As shown in Figure 1, load half a cup of soybeans in a glass and continue filling with millet until it is full of glass. Cover the glass and shake the glass. What did you find out? The cup became unhappy! What happened? The original, soybeans and millet mixed into each other after the interval of the other. We know that matter is composed of molecules, atoms and other particles, when mixed with different substances, there will be a similar situation? First, there is a gap between molecules? Experiment 1: alcohol and water mixture shown in Figure 2, Rubber plug, glass tube assembly of a device. First inject half tube water, and then into the alcohol (prior drops of alcohol in a few drops of red ink), close the rubber stopper fast full, with the syringe to continue adding alcohol,