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Dubnium

The discovery of dubnium (element 105) in 1970 is credited to scientists both in Russia and the United States. However, dubnium was named after the small town of Dubna in Russia.

Only a few atoms of highly radioactive dubnium have ever been isolated, as it does not occur naturally on Earth. Currently, this synthetic element is of research interest, but has no practical applications. If enough were ever accumulated in one place, dubnium would constitute a radiation hazard.