coroniumn.

/kɒˈrəʊnɪəm/

Etymology: < corona n.¹ 2, on the analogy of chemical names in -ium suffix.

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 ionized atoms of iron, nickel, and other elements. (Cf. helium n.)

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the world > matter > chemistry > elements and compounds > [noun] > elements > unknown or unnamed elements

coronium1890

nebulium1898

1890 C. A. Young Elem. Astron. vi. §207 The characteristic feature of the visual spectrum [of the sun's corona] is a bright line in the green..It coincides with a dark line..on Kirchhoff's map of the solar spectrum..This dark line..is a close double, one of its components being due to iron, while the other is due to some unknown gaseous element, which has been called Coronium after the analogy of Helium.

1898 Daily News 22 July 5/1 The latest sensation in the scientific world is the discovery of ‘terrestrial coronium’.

1956 H. S. Jones in A. Pryce-Jones New Outl. Mod. Knowl. 122 When the light of the corona is analysed with a spectroscope, it is found to contain radiations which have not been observed in the laboratory. When they were first observed, and for many years afterwards, they were attributed to a hypothetical unknown element, which was named ‘coronium’. Modern atomic theory left no room for such an element.

This entry has not yet been fully updated (first published 1893; most recently modified version published online December 2018).

单词	coronium
释义	coroniumn. /kɒˈrəʊnɪəm/ Etymology: < corona n.¹ 2, on the analogy of chemical names in -ium suffix. 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 ionized atoms of iron, nickel, and other elements. (Cf. helium n.) ΘΚΠ the world > matter > chemistry > elements and compounds > [noun] > elements > unknown or unnamed elements coronium1890 nebulium1898 1890 C. A. Young Elem. Astron. vi. §207 The characteristic feature of the visual spectrum [of the sun's corona] is a bright line in the green..It coincides with a dark line..on Kirchhoff's map of the solar spectrum..This dark line..is a close double, one of its components being due to iron, while the other is due to some unknown gaseous element, which has been called Coronium after the analogy of Helium. 1898 Daily News 22 July 5/1 The latest sensation in the scientific world is the discovery of ‘terrestrial coronium’. 1956 H. S. Jones in A. Pryce-Jones New Outl. Mod. Knowl. 122 When the light of the corona is analysed with a spectroscope, it is found to contain radiations which have not been observed in the laboratory. When they were first observed, and for many years afterwards, they were attributed to a hypothetical unknown element, which was named ‘coronium’. Modern atomic theory left no room for such an element. This entry has not yet been fully updated (first published 1893; most recently modified version published online December 2018). < n.1890
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