Dubnium, with the chemical symbol Db and atomic number 105, is an artificially produced chemical element that was first synthesized in 1970 at the Joint Institute for Nuclear Research (JINR) in Dubna, Russia. The discovery is credited to the work of scientists such as Georgi N. Flerov, Yu. Ts. Oganessian, and their teams. The research led to the successful fusion of 243Am with 22Ne ions. The name "Dubnium" is derived from the location of its discovery, Dubna.

Dubnium is extremely rare on Earth and does not occur naturally. It is artificially produced in particle accelerators and has limited applications, primarily in research for studying the properties of heavy ions.

The key Dubnium isotopes are Dubnium-268, Dubnium-270, and Dubnium-271. Dubnium-268 has a half-life of about 28 hours, Dubnium-270 about 1.2 hours, and Dubnium-271 about 20 minutes.

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