View source for Roentgenium

'''Roentgenium''' ({{pronEng|rɛntˈgɛniəm}}, {{IPA|/rʌntˈdʒɛniəm/}}) is a [[chemical element]]. It is a [[transition metal]]. Its symbol is '''Rg''', and its atomic number is 111.
[[File:Roentgen2.jpg|thumb|left|150px|[[Wilhelm Röntgen]]]]
[[File:Backdrop for presentation of Röntgenium, element 111, at GSI Darmstadt.JPG|thumbnail|Roentgenium presentation wall]]
The element is named in honor of a German [[physicist]] [[Wilhelm Röntgen]].

So far, it has not been found in nature. There seem to be 7 [[isotope]]s. All of them are [[Radioactivity|radioactive]]. They have a [[Half-life (element)|half life]] of between 1.6 milliseconds and 26 seconds. Because of the [[Inert pair effect]], it could have a color similar to that of [[gold]].

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[[Category:Transition metals]]
[[Category:Synthetic elements]]