| 单词 | niton |
| 释义 | nitonniton(ˈnaɪtɒn)nitonniton:see radonradon, gaseous radioactive chemical element; symbol Rn; at. no. 86; mass no. of most stable isotope 222; m.p. about −71°C;; b.p. −61.8°C;; density 9.73 grams per liter at STP; valence usually 0. Radon is colorless and the most dense gas known. ..... Click the link for more information. . nitonni·ton(nī'ton), |
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