H2Og

H2Og is a term used in speculative chemistry and science fiction to denote a hypothetical dihydrogen-oganesson molecule. In this concept, two hydrogen atoms would be bonded to a single oganesson atom (symbol Og), a superheavy element at the bottom of group 18. The notation mirrors H2O but substitutes oxygen with Og. The idea is not supported by experimental evidence; oganesson has only been produced in minute quantities and decays rapidly, making any concrete chemical characterization extremely challenging.

Properties and theoretical considerations: Relativistic effects are expected to dominate the chemistry of superheavy elements, leading to predictions that Og might exhibit atypical bonding and volatility relative to lighter noble gases. The feasibility of stable H2Og is uncertain, with most models suggesting the molecule would be highly short-lived and difficult to detect. If formed transiently, its spectroscopic signatures would be sought using fast detection techniques in particle accelerators.

Status and usage: H2Og remains a hypothetical construct used to explore the boundaries of chemical bonding in superheavy-element chemistry and as a narrative device in fiction. It illustrates how relativistic effects can complicate even simple formulas when applied to very heavy nuclei.

See also: Oganesson, superheavy elements, relativistic chemistry, water.