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Name Dubnium
Symbol Db
Atomic number 105
Atomic mass 262 amu
Classification Transition metal
Crystal structure Unknown
Color Unknown
Date of discovery 1970
Name of discoverer Albert Ghiorso
Name origin After Dubna, Russia.
Uses Dubnium has no known uses.
Obtained from Man-made.

Dubnium is an artificially produced radioactive element. The atomic weight of nine known isotopes range from 255 to 263; the longest-lived isotope, dubnium 268 has a half-life of 32 hours. Dubnium is very unstable and little is known about it.[1]