1 nanogram of natural uranium = 2,53.1012 atoms

The valence of uranium in uranium hexafluoride is 6+; the valence of fluorine is of course 1-.

G. M. Ritcey has written:

'Proceedings of the meeting of the Canadian Uranium Producers' Metallurgical Committee held in Mississauga, May 19-20, 1983' -- subject(s): Congresses, Environmental aspects, Environmental aspects of Radiation, Radiation, Uranium

'Solvent Extraction' -- subject(s): Extraction (Chemistry), Metallurgy

'Application of solvent extraction to common base metals' -- subject(s): Ore-dressing, Solvent extraction

Since you have stated that the uranium is pure, it is therefore all uranium and contains no lead; lead is not uranium.

Uranium is liquid above 1 132,2 0C.