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分子是构成物质的一种粒子,它具有以下一些性质:①分子的质量和体积都很小;②分子之间有一定的间隔;③分子在不断地运动着;④分子能保持物质的化学性质;⑤化学变化中分子可以再分。现以典型试题为例,对分子性质的学习作一些点拨。例1如图,向盛水的烧杯中放入一小粒品红,一段时间后,烧杯中形成红色溶液,此实验说明()。①分子处于不断运动之中;②分子大,原子小;③分子可再分,原子不能再分;
A molecule is a particle that constitutes a substance. It has the following properties: 1 The mass and volume of the molecule are small; 2 molecules have a certain gap; 3 molecules are constantly moving; 4 molecules can maintain the chemical nature of the substance. ;5 chemical molecules can be divided again. Taking typical test questions as an example, we will give some advice on the study of molecular nature. Example 1 As shown in the figure, put a small amount of magenta into a beaker of water. After a period of time, a red solution is formed in the beaker. This experiment shows (). 1 molecule is in constant motion; 2 molecules are large and atoms are small; 3 molecules can be subdivided and atoms can no longer be separated;