Technetium (Tc) has several isotopes, each with its own decay product. Here are the most common:

* Technetium-99m (^99mTc): This is the most widely used medical isotope of technetium. It decays by isomeric transition to technetium-99 (⁹⁹Tc), emitting gamma rays.

* Technetium-99 (⁹⁹Tc): This is the stable daughter isotope of technetium-99m. It decays by beta decay to ruthenium-99 (⁹⁹Ru).

* Technetium-95 (⁹⁵Tc): This isotope decays by beta decay to ruthenium-95 (⁹⁵Ru).

* Technetium-97 (⁹⁷Tc): This isotope decays by beta decay to ruthenium-97 (⁹⁷Ru).

Therefore, the main decay products of technetium are ruthenium (Ru) and stable technetium-99 (⁹⁹Tc).

It's important to note that the specific decay product depends on the specific isotope of technetium.