In Greek ἥλιος – “Sun”, see Helios. Interestingly, in the name of this element the typical for metals ending “um” was used (in Latin “-um” – “Helium”), as Lockyer suggested that the element he discovered was metal. By analogy with other noble gases, it would be logical to name it Helion” (“Helion”). In modern science, name “Helion” consolidated it's grip on core of helium light isotope.


In Greek κρυπτός – “Latent”. In the periodic table is included in the group of inert gases. In 1898 English scientist William Ramsay isolated from liquid air (after removing the oxygen, nitrogen and argon) mixture in which with the spectral method two gases were discovered: krypton (“latent”, “secret”) and xenon (“alien”, “unusual”).


In Greek νέος – “New”. There is a legend that the name of the element was given by Ramsay’s thirteen-year-old son - Willie, who asked his father how he is going to call the new gas, remarking that he wanted to give it a namenovum” (Latin – “New”). His father liked the idea, but he considered that the name “neon”, formed from the Greek synonym would sound better.


In Greek ξένος – “Foreign”. Discovered in 1898 by British researchers W. Ramsay and M. Travers, who subjected the liquid air to slow evaporation and investigated its most nonvolatile fractions by the spectroscopic method. Xenon was discovered as an impurity of krypton, what has caused its name. Xenon - a quite rare element. Under normal conditions 1,000 m3 of air contains about 87 cm3 of xenon.





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