118
Oganesson
Atomic Number118
Atomic Mass294 u
CategoryNoble Gas
State at Room TempSolid
Year Discovered2002
About Oganesson
The heaviest element ever created, named after Yuri Oganessian, only the second person honored while still alive. A handful of atoms, each gone in milliseconds. Sits below radon but is predicted to be a reactive solid rather than a gas, defying its noble group. For now, it marks the end of the periodic table.
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