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金属钠很容易被氧化.切开钠后,切面的银白色金属光泽很快便会消失,观察起来很不方便。在实践中我尝试制作了金属钠管,制作方法简单,操作方便,实验效果明显。制作:截取10 cm 长的一段玻璃导管,选取一块较大的金属钠,厚度以2 cm 为宜,将玻璃管稍用力插入钠中(注意:用力不要太猛,以免导管破碎,划伤手指)。在导管端口位置用刀切开,抽出导管,一段钠柱就留在了导管中。用细玻璃棒将钠柱送至导管中间位置,然后在两端各插入一根细铜丝,最后将导管的两端用石蜡密封,贴上标签。
Metallic sodium is easily oxidized. After the sodium is cut, the silvery-white metallic luster of the cut surface will soon disappear and it will be inconvenient to observe. In practice, I tried to make a metal sodium tube, the production method is simple, the operation is convenient, and the experimental results are obvious. Production: Cut a 10 cm length of glass tube, select a large piece of metal sodium, 2 cm in thickness, insert the glass tube into sodium slightly (Note: do not use force so as to avoid crushing the catheter and scratching the finger) . At the port of the catheter, a knife was used to open and the catheter was withdrawn. A section of sodium was left in the catheter. Using a fine glass rod, the sodium column was sent to the middle of the catheter, and then a thin copper wire was inserted at each end. Finally, both ends of the catheter were sealed with paraffin and labeled.