What is a radioactive isotope

radionuclide is an atom that has excess nuclear energy, making it unstable. This excess energy can be used in one of three ways: emitted from the nucleus as gamma radiation; transferred to one of its electrons to release it as a conversion electron; or used to create and emit a new particle from the nucleus

A) the enthralling of formation for pure element in its standard state is always positivehope this : )

Ithinks its false. tell me if im wrong