Changes

{{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 a half-life of 32 hours. Dubnium is very unstable and little is known about it.

'''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.<ref>http://www.lenntech.com/periodic/elements/db.htm#ixzz0fXKrhPDT</ref>

==References==

==References==

 

{{Periodic table}}

{{Periodic table}}

[[Category:Metals]]

[[Category:Metals]]

[[Category:Elements]]

[[Category:Elements]]