If you want to know where the data comes from for any particular property, then select that property. You'll see graphs for the properties as well. This page tells you how a sample of technetium might be made, or isolated . It is never necessary to make a sample of techntium anywhere other than specialist laboratories. This is because technetium is radioactive.
Technetium is a byproduct of the nuclear industry and is a product of uranium decay.
Alternatively it can be made by the bombardment of molydenum targets with deuterium nuclei. All rights reserved.