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Niels Bohr's original drawing of the structure of the Radium atom from his 1922 presentation. 🤓 http://pic.twitter.com/5pUqloxiCL

— Fermat's Library (@fermatslibrary) November 19, 2017

from Twitter https://twitter.com/fermatslibrary

November 19, 2017 at 06:04AM
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