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{{Element | name=Dubnium | symbol=Db | anumber=105 | amass=262 amu | noe=105 | class=Transition metal | cstructure=Unknown | color=Unknown | date=1970 | discname=[[Albert Ghiorso]] | origname=After Dubna, Russia. | uses=Dubnium has no known uses.| obtained=Man-made. }}
{{Element | name=Dubnium | symbol=Db | anumber=105 | amass=262 amu | noe=105 | class=Transition metal | cstructure=Unknown | color=Unknown | date=1970 | discname=[[Albert Ghiorso]] | origname=After Dubna, Russia. | uses=Dubnium has no known uses.| obtained=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 an half-life of 32 hours. Dubnium is very unstable and little is known about it.
==References==
http://www.lenntech.com/periodic/elements/db.htm#ixzz0fXKrhPDT