Pitchblende is also called uraninite.
It is a mineral of uranium containing UO2 and UO3.
It is primary source of uranium.
The mineral is black in color, like ‘pitch’.
The term ‘blende’ came from the German miners ,it contained many different metals all blended together.
Pitchblende contains many radioactive elements such as radium, lead, thorium, helium and several actinide elements.
Thus, the total number of metals present in pitchblend is 3.
They include U, Ra, Th.
Final answer:
The total number of metals present in pitchblend is 3,U, Ra, Th.