Technetium is an artificial chemical element, a solid metal.
Technetium is an artificial chemical element.
Technetium is an artificial chemical element.
the symbol for technetium is Tc
Technetium. Now technetium is considered also a natural chemical element.
Technetium is a radioactive chemical element.
Technetium is an artificial chemical element.
technetium (Te)
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).
Technetium is a man made element.