Darmstadtium (Ds)

From Wikipedia, the free encyclopediaDarmstadtium 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.

Darmstadtium in the periodic table

SymbolDs
Atomic number110
Group10
Period7
Blockd
Element categoryUnknown

Physical properties

Phase at STPSolid
Density34.8 g/cm3
Atomic weight281 u
Melting point K
°C
°F
Boiling point K
°C
°F

Atomära egenskaper

Electronegativity (Pauling Scale)
Electron affinity kJ/mol
Ionization energies
1 kJ/mol

Electron configuration

Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d8 7s2
Electrons per shell2, 8, 18, 32, 32, 16, 2

History

Discovered1994
Discovered byGesellschaft für Schwerionenforschung