The periodic table of elements and the countries they were discovered in http://pic.twitter.com/IJ8EOS9blJ
— History In Pictures (@HistoryInPix) February 19, 2017
via Twitter https://twitter.com/HistoryInPix
February 20, 2017 at 01:47AM
The periodic table of elements and the countries they were discovered in http://pic.twitter.com/IJ8EOS9blJ
— History In Pictures (@HistoryInPix) February 19, 2017
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