在古希腊,恩贝多克勒提出,宇宙间只存在火、气、水、土四种元素,并由它们组成世间万物。之后在很长一段时间内,水一直被人们认为是一种元素。直到18世纪末,这种错误认识才得以颠覆。那么,对于水的组成的认识过程,又充满着怎样的传奇色彩呢?故事要从两百多年前说起……1781年,英国有位著名的化学家叫普利斯特里,他很喜欢给朋友们表演化学魔术。每当有朋友到他的实验室参观时,他便会拿出一个空瓶子给大家表演:当他把瓶口 In ancient Greece, Empedocles proposed that only the four elements of fire, gas, water and soil exist in the universe and that they form all things in the world. After a long period of time, water has always been considered as an element. It was not until the eighteenth century that this misconception was subverted. So, what is the legendary way of knowing the composition of water? The story needs to be talked about two hundred years ago ... In 1781, there was a famous British chemist named Priestley, who was very Like to show chemistry magic to friends. Whenever a friend visits his lab, he will come up with an empty bottle for everyone to perform: When he put the bottle