- any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table. They were long believed to be totally unreactive but compounds of xenon, krypton, and radon are now known.
noun: noble gas, plural noun: noble gases
... located between two panels of glass hold an inert mixture of noble gases (neon and xenon). The gas in the cells is electrically turned...
7.寫貴族－瓦斯－被為團體 5 一和 Period4 的元素縮寫電子結構的核心．...8.哪下列各項是反磁性的和那一個是常磁性的？ 解釋。9.哪些群體的元素有有最大的否定的電子密切關係評價？ 解釋。
..., alkali earth metals, transition metals, halogens and noble gases 2006-05-23 18:17:27 補充： 5. "alloy", they are referring...