1. Protactinium exist in extremely low concentrations in uranium ores (approx. 3 mg/kg).
2. Protactinium can be obtained artificially by nuclear reactions from thorium 232.
Today protactinium has not practical uses.
Protactinium is a natural chemical element, found in uranium ores as pitchblende in extremely low concentrations; but protactinium can be obtained artificially by nuclear reactions from 232Th.
Nothing is made from protactinium.
I suppose that the hardness of protactinium was not determined up today.
Only protactinium is the correct name today.
Protactinium has not uses.
1. Protactinium is found in extremely low concentrations in uranium ores. 2. Protactinium can be obtained artificially from 232Th by nuclear reactions.
Protactinium exist in minute traces in uranium ores.
Protactinium is a natural chemical element; but protactinium can be obtained artificially by nuclear reactions from 232Th.
Protactinium is a natural chemical element; but protactinium can be obtained artificially by nuclear reactions from 232Th.
Protactinium is a natural radioactive chemical element.
Today only protactinium is a correct name.