Elementga

Elementga is a fictional chemical element often used in speculative science and science fiction to explore ideas about the far end of the periodic table. Unlike elements that have been observed in laboratories, elementga does not have verified existence and is typically treated as a placeholder for the unknown chemistry of superheavy elements beyond the current limits of the periodic table.

In many portrayals, elementga would lie in the post-transition region, with atomic number well above 118. Models vary, but common themes include extreme instability, with very short half-lives that challenge experimental observation, and pronounced relativistic effects on electron structure that could yield unconventional chemistry or bonding.

Predicted properties are speculative. Some accounts assign partial noble-gas or highly inert behavior; others suggest multiple oxidation states and complex covalent networks under extreme conditions. Physical properties such as density and melting point are likewise uncertain and model-dependent. Because of the unknowns, discussions of elementga are mainly used to illustrate limits of synthesis and computational predictions for superheavy elements.

Status and usage: Elementga remains a theoretical construct. It appears in thought experiments, periodic-table extension exercises, and fiction; it has no confirmed synthesis or measurement in the real world. It is sometimes discussed alongside other hypothetical elements such as ununennium (element 119) and beyond, to discuss how chemistry might evolve with increasing atomic number.

See also: superheavy element, periodic table, hypothetical element.