![](https://webarchive.library.unt.edu/eot2008/20090508033526im_/http://nsf.gov/images/x.gif) News From the Field Solving a Subatomic Shell Game
![](https://webarchive.library.unt.edu/eot2008/20090508033526im_/http://nsf.gov/images/greenlineshort.jpg)
March 23, 2009
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Physicists at Michigan Technological University have filled in some longtime blank spaces on the periodic table, calculating electron affinities of the lanthanides, a series of 15 elements known as rare earths.
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Source Michigan Technological University
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