The Group 5 element reference article from the English Wikipedia on 24-Jul-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Group 5 element

A Group 5 element is an element in periodic table group 5 (IUPAC style) in the periodic table, which consists of:

• vanadium (23)
• niobium (41)
• tantalum (73)
• dubnium (105)

All of these elements are classed in Group 5 because their valence shell holds four electrons. Dubnium can only be produced in the laboratory, it does not exist in nature.

Key to color coding in table slice on right:

Transition metals

Color coding for these atomic numbers: At room temperature, all are solid; red indicates item is synthetic and does not occur naturally.

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