Hs
Hassium
Element 108 · 269.1336 u
Transition Metal
d-block
Period 7
Group 8
Solid at RT
Radioactive
t½ 130 seconds
Synthetic
Wikipedia →
Hassium is the heaviest element whose chemistry has been experimentally studied.
Physical Properties
| Atomic Mass | 269.1336 u |
| Density | 40.7 g/cm³ |
| Appearance | Metallic (predicted) |
| State at Room Temp | Solid |
Chemical Properties
| Oxidation States | +8 |
Atomic Properties
| Electron Configuration | [Rn] 5f14 6d6 7s2 |
Discovery
| Discovered By | Peter Armbruster, Gottfried Munzenberg and others |
| Discovery Year | 1984 |
| Location | Darmstadt, Germany |
| Named After | Named after Hesse (Hassia), the German state |
About Hassium
Hassium was synthesized by bombarding lead with iron ions. Its volatile oxide HsO4 was detected, confirming osmium-like behavior.
Uses & Applications
No practical applications. Scientific research only.
Fun Fact
Scientists detected hassium's volatile oxide, proving it behaves like osmium -- the heaviest element with confirmed chemistry.
Isotopes
| Mass Number | Abundance | Half-Life | Stable |
| 269 | - | 9.7 seconds | No |
| 277 | - | 130 seconds | No |
Electron Configuration
[Rn] 5f14 6d6 7s2