To produce uranium
Radium is a decay product of uranium.
Uranium and zirconium ores
Europe
Generally yes (of course, the uranium ores).
Silver is not extracted from uranium ores.
Sodium carbonate solution (at a temperature of ca. 100 0C and a high pressure) can be used to dissolve uranium ores after grinding.
Francium hasn't ores; infinitesimal amounts of francium exist in some uranium ores.
Yes, uranium ores are available in many countries.
Uranium ores can be in the future an important ressource of Chad.
Plutonium has no ores; plutonium exist naturally in extremely traces in uranium ores.
Yes. In the ores of the earth.
yes