Thorium: 90 protons
Uranium: 92 protons
In Middlesex (USA) was an uranium, thorium and beryllium facility, not mines.Today the activity ceased.
Uranium-235, found in natural Uranium at a level of 0.72%Uranium-233, produced in breeder reactors from Thorium-232
Uranium atoms have 92 protons, which is the highest number found naturally.
Radium has not its own minerals; radium exist in extremely low concentrations in uranium and thorium ores.
Francium exist in infinitesimal concentrations in uranium and thorium ores.
No it is not found . Monazite sand usually contains thorium.
The symbol of the element found in pitchblende after uranium extraction is thorium, with the chemical symbol Th. Thorium is a radioactive metal and is often found in association with uranium ores, including pitchblende.
Francium is a naturally occurring radioactive element that is produced as a decay product of uranium and thorium. It is found in tiny amounts in uranium and thorium ores. Francium was first discovered in 1939 by Marguerite Perey in France.
In Middlesex (USA) was an uranium, thorium and beryllium facility, not mines.Today the activity ceased.
Actinium is found in uranium and thorium ores.
Francium exist in uranium and thorium ores but it is not exploitable.
Polonium exist in traces in uranium and thorium ores.
Actinium exist in minute traces in uranium and thorium ores.
Mostly Uranium and sometimes thorium also. Uranium is obtained from Australia, France, Russia etc and thorium is found in India along with other Asian countries.
Uranium-235, found in natural Uranium at a level of 0.72%Uranium-233, produced in breeder reactors from Thorium-232
Radium exist in very low concentrations in uranium and thorium ores.
Radium exist in very low concentrations in uranium and thorium ores.