Technetium is an artificial chemical element and is extracted from fission products, prepared by neutron activation or by irradiation in particles accelerators.
Technetium is an artificial chemical element.
Technetium is an artificial chemical element, a solid metal.
Technetium is an artificial chemical element.
Technetium. Now technetium is considered also a natural chemical element.
Technetium is an artificial chemical element.
Technetium is a man made chemical element.
Technetium
This element is technetium (Tc); but today traces of natural technetium were discovered.
the symbol for technetium is Tc
This element is technetium (Tc).
Technetium is not a naturally-occurring element; it was created in a laboratory.
Tc stands for the element technetium. Technetium is a silvery-gray metal and it is the first element on the periodic table that does not have any stable isotopes.