Elementvis

Elementvis (symbol Ev) is a fictional chemical element used in speculative discussions of superheavy elements and in science-fiction worldbuilding. In most renderings, Elementvis is imagined to occupy a position beyond the currently known periodic table, with an atomic number well into the 120s or higher. The name combines the words element and vis, reflecting its status as a hypothetical source of fundamental force in some narratives; in other variants it is simply a placeholder for research into the limits of chemical stability.

In theoretical models, Elementvis is described as synthetic and extremely short‑lived, produced only in particle accelerators through fusion reactions of heavy actinide targets with light projectiles. Its predicted properties include a very high atomic mass, volatile or semi‑metallic character, and strong relativistic effects that influence its chemical behavior. Some proposals state that Ev would form high‑oxidation‑state compounds and exhibit photoluminescence when exposed to electric fields, though such behavior remains purely speculative.

Applications in fiction often cite Elementvis as a potential energy or photonic material, offering dramatic demonstrations of short lifetimes and rapid decay chains. In science education and speculative chemistry, Elementvis serves as a device to illustrate challenges in stabilizing superheavy elements, relativistic chemistry, and the impact of extreme nuclear properties on chemical trends. There is no experimental evidence for Elementvis, and it is not recognized in any formal periodic table. Real research on superheavy elements continues to probe the boundary between chemistry and nuclear physics, sometimes invoking similarly named hypothetical elements in thought experiments.