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Bohrium (Bh)
Atomic number 107 · transition
| Atomic number | 107 |
|---|---|
| Atomic mass | 274.0 u |
| Molar mass | 274.0 g/mol |
| Category | transition |
| Group / period / block | 7 / 7 / d |
| Electron configuration | [Rn] 5f14 6d5 7s2 |
| Electrons per shell | 2, 8, 18, 32, 32, 13, 2 |
| Density | 37.1 g/cm³ |
| First ionisation energy | 7.7 eV |
Uses
Research only — synthetic, made a few atoms at a time
Discovery
1976, Heavy Ion Research Laboratory (HIRL)