Chemical Formula
Bh
Background
Two German scientists Armbruster and Münzenberg unambiguously identified bohrium in 1981 at the Gesellschaft für Schwerionenforschung while bombarding 209Bi with a beam of 54Cr ions using the universal linear accelerator. Following this, the IUPAC named the element as bohrium.
Basic Information
| Name |
Bohrium |
| Symbol |
Bh |
| Atomic number |
107 |
| Atomic weight |
272 amu |
| Standard state |
Presumably solid at 298 K |
| CAS Registry ID |
54037-14-8 |
| Group in periodic table |
7 |
| Period in periodic table |
7 |
| Block in periodic table |
d-block |
| Color |
Unknown, but probably metallic and silvery white or grey in appearance |
| Classification |
Metallic |
| Melting point |
Unknown |
| Boiling point |
Unknown |
| Density |
Unknown |
| Phase at room temperature |
Solid |
Occurrence
Bohrium is a man-made element. Very few bohrium atoms have been made so far since it decays very quickly by emitting alpha-particles.
Bohrium (version 1) - Periodic Table of Videos
Isotopes
Bohrium has 11 known isotopes that include 260Bh, 261Bh, 262Bh 264Bh, 265Bh, 266Bh, 267Bh 270Bh, 271Bh, 272B and 274Bh. None of them are stable. However, the longest-lived isotope is 270Bh having a half-life of about one minute.
Production
Bohrium is produced by bombarding a bismuth target using chromium atoms through cold fusion method.
209Bi + 54Cr → 262Bh + n
Key Properties
The key properties of bohrium include the following:
- It is a synthetically made radioactive element
- It is expected to have chemical properties similar to that of rhenium.
Applications
Other than scientific research, bohrium has no specific uses currently.
References
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