X - "RADON".
In 1910, Sir William Ramsay and Robert Whytlaw-Grey isolated radon, determined its density, and determined that it was the heaviest known gas. They wrote that "L'expression de l'émanation du radium est fort incommodé", (the expression of radium emanation is very awkward) and suggested the new name niton (Nt) (from the Latin "nitens" meaning "shining") to emphasize the radioluminescence property, and in 1912 it was accepted by the International Commission for Atomic Weights. In 1923, the International Committee for Chemical Elements and INTERNATIONAL UNION OF PURE AND APPLIED CHEMISTRY (IUPAC) chose among the names radon (Rn), thoron (Tn), and actinon (An).
In 1910, Sir William Ramsay and Robert Whytlaw-Grey isolated radon, determined its density, and determined that it was the heaviest known gas. They wrote that "L'expression de l'émanation du radium est fort incommodé", (the expression of radium emanation is very awkward) and suggested the new name niton (Nt) (from the Latin "nitens" meaning "shining") to emphasize the radioluminescence property, and in 1912 it was accepted by the International Commission for Atomic Weights. In 1923, the International Committee for Chemical Elements and INTERNATIONAL UNION OF PURE AND APPLIED CHEMISTRY (IUPAC) chose among the names radon (Rn), thoron (Tn), and actinon (An).
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