Theum
Theum is a fictional chemical element used in speculative fiction and worldbuilding to stand in for a hypothetical superheavy metal. In most representations, Theum is assigned the symbol Thm and an arbitrary atomic number, commonly 144, though details vary by universe. It is typically described as possessing exceptional density and a high melting point, along with distinctive electronic or magnetic properties that set it apart from real-world elements.
Origins and production in fiction vary. Theum does not occur naturally on Earth in credible scientific accounts.
Physical and chemical properties of Theum are depicted inconsistently across works, but several convergent themes appear.
Applications and motifs: Within its fictional contexts, Theum is imagined for advanced technologies such as powerful