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