氪元素符号kr,原子序数36,原子量83.80,外围电子排布4s24p6,位于第六周期0族。单质由单原子分子组成,稀有气体,无色、无嗅、无味。密度3.733克/升,熔点-156.6℃,沸点为-153.3±0.1℃。原子范氏半径198皮米,第一电离能1351kJ/mol。20℃时每升水可溶解23毫升。化学性质极不活动,已制得在-80℃时才稳定的化合物氟化氪KRf2。用于充填电灯泡和电子器件。能吸收X射线,用作X射线工作时的遮光材料。
当它们被密封之后,就向其中注入氪气和氩气。
After they are sealed up, krypton and argon gasses are pumped into the space in between.
氪气有几个稳定的同位素,并带来相关的大量的可以用于剖析大气来源的数据。
Krypton has several stable isotopes, the relative abundances of which can be used to parse the gas's source.
氪气会包围在红外传感器表面,冰块由此形成,能把传感器的温度降低到零下几百度。
Krypton gas will surround its infrared sensors, allowing ice cubes to form that will cool the sensors to hundreds of degrees below zero.
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