Rodentium

Rodentium is a fictional element that appears in the Marvel Cinematic Universe, specifically in the film "Ant-Man and the Wasp: Quantumania." It is a highly unstable and radioactive element that was created by the Quantum Realm, a dimension parallel to Earth. Rodentium has the atomic number 115 and the symbol R. It is named after the Quantum Realm's inhabitants, the Pym particles, which are tiny, humanoid creatures that resemble rodents.

Rodentium is highly unstable and can cause significant damage to living organisms. It is also highly radioactive, emitting gamma rays that can penetrate through most materials. In the film, Rodentium is used as a weapon by the Quantum Realm's inhabitants to destroy Earth. However, it is later revealed that Rodentium can also be used to create powerful weapons and technology.

Rodentium is a key element in the plot of "Ant-Man and the Wasp: Quantumania," as it plays a crucial role in the battle between the Quantum Realm and Earth. The film's protagonists, Scott Lang and Hope van Dyne, must find a way to harness the power of Rodentium to defeat the Quantum Realm's inhabitants and save Earth from destruction.