Dubnium
(Redirected from Hahnium)
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Dubnium is a chemical element, having the chemical symbol Db and its atomic number (the number of protons) is 105. It has a standard atomic weight of 268 g•mol −1.
Dubnium is considered a member of the "Transition metal" class of elements. There is no reliable data as to its boiling point or melting point.