氙者,化學元素也,符號Xe,原子序五十四,屬貴氣體,色、嗅、味皆無。外圍電子有八,臻「八隅體」之穩態,故性孤而安。
攝氏負一百一十一又十分之七度見熔,攝氏負一百又八又百分之十二度見沸。
以氣為常,既不助燃,亦不自燃,性平穩。惟化合者,仍逾八十,屬貴氣體之最。入於燈管,通以電力,則耀紫光。
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