But, this did not exhaust the list of "godfathers" of uranium. The third was D. Mendeleyev.

   At first uranium just would not fit into the table. It was given a place in the third group between cadmium and tin, where indium is now situated. This place was allotted to uranium in accordance with its atomic weight, but not its properties. With respect to properties, uranium looked like a casual stranger in the box allotted to it. Mendeleyev concluded that the atomic weight of uranium had been determined incorrectly and he increased it by 50 per cent. This put uranium in Group VI of the table and made it the last in the series of elements.

   Such was the third birth of uranium.

   Soon experimenters showed that Mendeleyev was right.

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