110
Ds
Darmstadtium
281
Darmstadtium (Ds)
Transition MetalGroup 10Period 7d-block-blockRadioactive
Darmstadtium is a chemical element with symbol Ds and atomic number 110. It is an extremely radioactive synthetic element. The most stable known isotope, darmstadtium-281, has a half-life of approximately 10 seconds.
Latin name: Darmstadtium
Atomic Number
110
Atomic Mass
281 g/mol
Phase (STP)
Solid (predicted)
Electron Config.
[Rn] 5f¹⁴ 6d⁹ 7s¹
General
SymbolDs
Atomic Number110
Atomic Mass281 g/mol
CategoryTransition Metal
Group10
Period7
Blockd-block
Electron Configuration[Rn] 5f¹⁴ 6d⁹ 7s¹
Valence Electrons10
Colourmetallic (predicted)
Physical Properties
Phase (STP)Solid (predicted)
Density34 (predicted)
Melting PointUnknown (predicted ~1800)
Boiling PointUnknown
Atomic Properties
Atomic Radius234 pm
Oxidation States+8, +6
Ion ChargeDs6+/Ds8+
Nuclear & Hazards
RadioactiveYes
Half-life12.7 seconds (Ds-281)
Abundance
In Earth's Crust0%
Discovery & History
Discovery Year1994
Discovered ByGesellschaft für Schwerionenforschung (GSI), Darmstadt
Country of DiscoveryGermany
Isotopes of Darmstadtium
| Isotope | Abundance | Half-life | Decay |
|---|---|---|---|
| Ds-279 | — | ~0.18 seconds | α |
| Ds-281 | — | ~12.7 seconds | α |