108Hs[269]
Hassium (Hs)
Element 108 Ā· Transition metal
Hassium (Hs) is a chemical element with atomic number 108. It is classified as a transition metal in period 7, group 8 of the periodic table (the d-block). Its most stable known isotope has mass number 269 and its ground-state electron configuration is [Rn] 5fĀ¹ā“ 6dā¶ 7sĀ². Its properties are largely predicted, as only a few atoms have ever been produced.
Hassium facts
| Atomic number (Z) | 108 |
|---|---|
| Symbol | Hs |
| Mass number of most stable isotope | [269] |
| Category | Transition metal |
| Group | 8 |
| Period | 7 |
| Block | d-block |
| Electron configuration | [Rn] 5fĀ¹ā“ 6dā¶ 7sĀ² |
| Electronegativity (Pauling) | ā |
| State at 20 Ā°C | Unknown (synthetic) |
| Protons / electrons | 108 / 108 |
| Neutrons (most common isotope, approx.) | 161 |
| Molar mass | 269 g/mol |