Final answer:
Yuri Oganessian is the only person to have an element, oganesson (Og), named after him while he was alive
Step-by-step explanation:
The only person in history to have an element named after him while still alive is Yuri Oganessian. The element named in his honor is called oganesson (Og), which carries the atomic number 118. The International Union of Pure and Applied Chemistry (IUPAC) recognizes these names after ensuring that they meet the standardized criteria, even though the discoverers initially propose them.