Technetium and Promethium?

Question

where, when, who, what, and how is technetium used?
where, when, who, what, and how is promethium used?
AND
where, when, who, what, and how is technetium mined and otherwise isolated for use?
where, when, who, what, and how is promethium mined and otherwise isolated for use?

Answer 1

I think this is a trick question.

As far as I recall, both of these are so radioactive - unstable that they are no longer found naturally on the Earth. So they cannot be mined.

If produced synthetically, they could be used as radioactive trace elements, but are probably too expensive for that use.

Answer 2

google.com might be able to help here, cause I sure don't know