Noble gas in the United States alone. For large-scale use, helium is extracted by fractional distillation from natural gas, which can contain up to 7% helium. Neon, argon, krypton, and xenon are obtained from air using the methods of liquefaction of gases, to convert elements to a liquid state, and fractional distillation, to separate mixtures into component parts. Helium is typically produced by separating it from natural gas, and radon is isolated from the radioactive decay of radium compounds. The prices of the noble gases are influenced by their natural abundance, with argon being the cheapest and xenon the most expensive. As
The Adventure of the Noble Bachelor The Adventure of the Noble Bachelor "The Adventure of the Noble Bachelor", one of the 56 short Sherlock Holmes stories written by British author Sir Arthur Conan Doyle, is the tenth of the twelve stories collected in "The Adventures of Sherlock Holmes". The story was first published in "Strand Magazine" in April 1892. The story entails the disappearance of Hatty, Lord St. Simon's bride on the day of their marriage. She participates in the wedding, but disappears from the reception. The events of the wedding day are most perplexing to Lord St. Simon as it seemed to him that his