Alkynit

Alkynit is a hypothetical chemical element with the symbol Ak and atomic number 122. As an as-yet undiscovered element, its properties are largely theoretical. It is predicted to reside in the g-block of the periodic table, making it a superactinide. Alkyne would be one of the heaviest elements ever synthesized, and its existence would push the boundaries of our understanding of nuclear stability.

The synthesis of alkynit, if successful, would likely involve bombarding heavy target nuclei with lighter ions at high energies. The extreme instability of such superheavy elements means that any synthesized atoms of alkynit would have incredibly short half-lives, decaying almost instantaneously. Researchers are interested in synthesizing such elements to test theoretical models of nuclear structure and to explore the "island of stability," a predicted region of superheavy isotopes with longer half-lives. The exact chemical properties of alkynit are speculative but would likely be influenced by relativistic effects due to its high atomic number.