An element formerly supposed to exist in a gaseous state in the sun's corona: the spectral lines attributed to it are now known to be due to highly…
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| 单词 | θ69224 |
| 释义 | the world > matter > chemistry > elements and compounds > [noun] > elements > unknown or unnamed elements (2) coronium1890 An element formerly supposed to exist in a gaseous state in the sun's corona: the spectral lines attributed to it are now known to be due to highly… nebulium1898 A hypothetical chemical element proposed to explain a set of green lines in the spectra of many gaseous nebulae (now attributed to forbidden… |
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