Darmstadtium: Chemical element with atomic number 110

It has been named ununnilium (Uun) or eka-platinum but is now named darmstadtium. It has the symbol Ds. It has the atomic number 110. It is a transuranium element.

Darmstadtium, ₀₀Ds

Darmstadtium
Pronunciation	/dɑːrmˈstætiəm/ (darm-STAT-ee-əm) /dɑːrmˈʃtætiəm/ (listen) (darm-SHTAT-ee-əm)
Mass number	[281]
Darmstadtium in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson Pt ↑ Ds ↓ (Uhq) meitnerium ← darmstadtium → roentgenium
Group	group 10
Period	period 7
Block	d-block
Electron configuration	[Rn] 5f14 6d8 7s2 (predicted) (predicted)
Electrons per shell	2, 8, 18, 32, 32, 16, 2 (predicted)
Physical properties
Phase at STP	solid (predicted)
Density (near r.t.)	34.8 g/cm3 (predicted)
Atomic properties
Oxidation states	(0), (+2), (+4), (+6), (+8) (predicted)
Ionization energies	1st: 960 kJ/mol 2nd: 1890 kJ/mol 3rd: 3030 kJ/mol (more) (all estimated)
Atomic radius	empirical: 132 pm (predicted)
Covalent radius	128 pm (estimated)
Other properties
Natural occurrence	synthetic
Crystal structure	​body-centered cubic (bcc) (predicted)
CAS Number	54083-77-1
History
Naming	after Darmstadt, Germany, where it was discovered
Discovery	Gesellschaft für Schwerionenforschung (1994)
Isotopes of darmstadtium v e
Main isotopes Decay abun­dance half-life (t1/2) mode pro­duct 279Ds synth 0.2 s α10% 275Hs SF90% – 281Ds synth 14 s SF94% – α6% 277Hs
Category: Darmstadtium view talk edit | references

The element is named in honor of German city Darmstadt.

Darmstadtium is a radioactive element that does not exist in nature. It has to be made. The isotopes with an atomic mass from 267 to 273 have very short half-lifes. The half life of these isotopes is measured in milliseconds. Isotopes of darmstadtium with an atomic mass of 279 and 281 were synthesised after the other isotopes. Ds-279 and Ds-281 decay more slowly. The isotope with an atomic mass of 279 has a half life of 180 milliseconds and Ds-281 has a half life of 11.1 seconds.

No uses for darmstadtium are known. What darmstadtium looks like is not known because not enough has been made to see it with human eyesight.

Darmstadtium was first made on November 9, 1994. It was made at the Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany. Only a few atoms of it were made. It was made by bombarding a lead target with nickel. A nuclear fusion reaction happened and made the element.

This is shown by the equation below that is the reaction that happened. Pb is the symbol for lead, Ni is the symbol for nickel and n is the symbol for a neutron.

²⁰⁸
₈₂Pb + ⁶²
₂₈Ni→ ²⁶⁹
₁₁₀Ds + ¹
₀n

The element was named for Darmstadt which was the place of its discovery. The GSI is in Wixhausen, a part of the north of the city of Darmstadt. The new name (darmstadtium) was given to the chemical element by the IUPAC in August 2003.