物质一共有几种状态?
科学家目前已经发现了超过6种物质状态,并且还有越来越多的新状态被发现。首先是4种物质的基本状态:气态、液态、固态和等离子态。前三种我们或许已经非常熟悉,第四种等离子态是热的带电气体,由带正电的离子和自由电子组成。
剩下的其他物质状态较少见,而且大多也只在较特殊的环境下才出现。例如“玻色-爱因斯坦凝聚态”。这种状态于1995年被科学家发现,当时他们把气体冷却至非常接近绝对零度-273.15℃,此时,气体的分子运动几乎停止,而其中的原子却聚集在了一起,仿佛形成了单个原子。又例如无定形体态,这种状态的物质既拥有像液体那样的不规则结构,其分子又像固体的那样不自由。我们常见的玻璃和合成橡胶等物质的状态就属于无定型体态。
除了前面提到的6种状态,其余的状态还有液晶态(常用于液晶显示器)、超流体态(液氦)和超固体态(分子表现得跟固体一样稳定,但物质却能流动),等等。我们可以预见,科学家未来还会发现更多新的物质状态。
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