氙化学元素，化学符号，Xe原子序数54。
Xenon chemical element, chemical symbol Xe, atomic number 54.
稀有气体(亦称惰性气体)：通常排列在周期律中最右边一族的六种化学元素：氦、氖、氩、氪、氙和氡。
Noble gas (or inert gas) : Any of the six chemical elements that make up the rightmost group of the periodic table as usually arranged: helium, neon, argon, krypton, xenon, and radon.
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