- Group 5 element
A Group 5 element is one in the series of elements in group 5 (
IUPACstyle) in the periodic table, which consists of vanadium(V), niobium(Nb), tantalum(Ta), and dubnium(Db).
All of these elements are classed in Group 5 because their
valence shellholds five electrons. Dubnium can only be produced in the laboratory, and does not exist in nature.
Of the group 5 elements, only vanadium has been identified as playing a role in the biological chemistry of living systems: it is involved in some of the
enzymesof higher organisms, and also, unusually, in the biochemistry of some marine tunicates.
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