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Group 7 element
From Wikipedia, the free encyclopedia
| Group | 7 |
|---|---|
| Period | |
| 4 | 25 Mn |
| 5 | 43 Tc |
| 6 | 75 Re |
| 7 | 107 Bh |
A Group 7 element is one in the series of elements in group 7 (IUPAC style) in the periodic table, which consists of the transition metals manganese (Mn), technetium (Tc), rhenium (Re), and bohrium (Bh).
All of these elements are classed in Group 7 because their valence shells hold four electrons. Technetium has no stable isotopes. Technetium and promethium are the only two such elements before polonium, after which no known element has a stable isotope.
| Explanation of right side periodic table slice: | Transition metals | atomic number in black are solids | solid borders are older than the Earth (Primordial elements) | dotted borders are made artificially (Synthetic elements) | dashed borders have no isotopes older than the earth |
Standard · Vertical · Full names · Names and atomic masses · Text for last · Electron configurations
Metals and nonmetals · Blocks · Valences · Inline f-block · 218 elements · Alternatives
Lists of elements:
Name · Atomic symbol · Atomic number · Boiling point · Melting point · Density · Atomic mass
Groups:
1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · 11 · 12 · 13 · 14 · 15 · 16 · 17 · 18
Periods:
1 · 2 · 3 · 4 · 5 · 6 · 7 · 8
Series:
Alkalis · Alkaline earths · Lanthanides · Actinides · Transition metals
Poor metals · Metalloids · Nonmetals · Halogens · Noble gases