What element has the symbol 'Tc'?

The story behind the answer

Technetium has the symbol Tc. The other T-elements use different pairs: Tantalum is Ta, Thallium is Tl, and Tellurium is Te—so Tc uniquely points to Technetium.

Fun fact: Technetium (atomic number 43) was the first element artificially produced, named from the Greek technetos, meaning “artificial.” It is the lightest element with no stable isotopes, and its metastable isotope Tc‑99m is a workhorse of nuclear medicine, used for imaging organs because it emits detectable gamma rays with low patient dose.

Memory tip: Think “Tech = Tc” and “made by technology.” If you see Tc, picture a hospital scanner—Technetium is the “tech” element.