Quick answerBohrium (Bh) is a transition metal with atomic number 107 and a mass number of 270 (the most stable isotope), in group 7, period 7. It was discovered by Gottfried Münzenberg and colleagues in 1981. It is used for superheavy element research and testing periodic trends. Its electron configuration is [Rn] 5f14 6d5 7s2 (predicted).
Bohrium is a synthetic element named for Niels Bohr, created in Darmstadt to test the limits of the periodic table.
Key facts
| Symbol | Bh |
|---|---|
| Atomic number | 107 |
| Atomic mass | [270] — mass number of the most stable isotope |
| Category | transition metal |
| Group | 7 |
| Period | 7 |
| Block | d-block |
| Electron configuration | [Rn] 5f14 6d5 7s2 predicted |
| Discovered | Gottfried Münzenberg and colleagues, 1981 |
| Uses | superheavy element research, testing periodic trends |
Quick quiz
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Keep exploring
- Periodic table — all 118 elements
- Gold (Au) — another transition metal, atomic number 79
- Mercury (Hg) — another transition metal, atomic number 80
- Rutherfordium (Rf) — another transition metal, atomic number 104
- Dubnium (Db) — another transition metal, atomic number 105
- Seaborgium (Sg) — another transition metal, atomic number 106
- Hassium (Hs) — another transition metal, atomic number 108
- Meitnerium (Mt) — another transition metal, atomic number 109
- Darmstadtium (Ds) — another transition metal, atomic number 110
- Roentgenium (Rg) — another transition metal, atomic number 111
- Copernicium (Cn) — another transition metal, atomic number 112
- All transition metal elements — on the periodic table
Sources & last updated
- CIAAW — Standard Atomic Weights
- PubChem Periodic Table
- Wikipedia — Timeline of chemical element discoveries
- Wikipedia — Bohrium
Last updated: . Figures are shown with their year; where sources disagree, the value is left out rather than estimated.