Assertion: polonium's structure | /r/HasProperty | discovered
Facets:
Source sentences:
text: Joly did most of his work with discoloration haloes in the first decade of the Twentieth Century, a time when the structure of the atom was just being discovered, and before the crystal structure of minerals had been unraveled.
text: Gentry bases this assumption on past research done at a time when the structure of the atom was just being discovered.