| 单词 |
periodic table of the elements: radon |
| 释义 |
Periodic Table of the Elements: Radon Related article: Periodic Table of the Elements (table)Periodic Table of the Elements
(showing atomic number and atomic symbol; click on atomic symbol for more detailed information)
Groups
..... Click the link for more information. Periodic Table of the Elements: Radon | Atomic Number: | 86 | | Atomic Symbol: | Rn | | | 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. | | Atomic Weight: | (222) | | Electron Configuration: | 2 · 8 · 18 32 · 18 · 8 | |
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