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.
the symbol for technetium is Tc
Technetium. Now technetium is considered also a natural chemical element.
Technetium is an artificial chemical element.
technetium (Te)
Technetium is a radioactive chemical element.
Technetium is a man made chemical element.
Technetium
This element is technetium (Tc); but today traces of natural technetium were discovered.
This element is technetium (Tc).