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Group 7 element

A Group 7 element is an element in periodic table group 7 (IUPAC style) in the periodic table, which consists of:

• manganese (25)
• technetium (43)
• rhenium (75)
• bohrium (107)

All of these elements are classed in Group 7 because their valence shell holds four electrons. Technetium has no stable isotopes. Technetium, and promethium (61), are the only two such elements before polonium, after which no known element has a stable isotope.

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.