. . . "Rudolf Hoppe (29 October 1922 \u2013 24 November 2014), a German chemist, discovered the first covalent noble gas compounds."@en . "Hoppe, Rudolf"@en . "2014-11-24Z"^^ . . "1922Z"^^ . "1922-10-29Z"^^ . . . "2014Z"^^ . . "Rudolf Hoppe"@en . . . . . "Chemist; Scientist" .