Meitnerium



109 darmstadtium
Ir
↑
Mt
↓
(Upe)
General
Number meitnerium, Mt, 109
transition metals
Block 9, d
Appearance unknown, probably silvery
white or metallic gray
Standard atomic weight (278)  g·mol−1
iridium)
shell 2, 8, 18, 32, 32, 15, 2
Phase presumably a solid
CAS registry number 54038-01-6
Selected isotopes
Main article: Isotopes of meitnerium
iso NA half-life DM DE (MeV) DP
276Mt syn 0.72 s
References

Meitnerium (half-life of 720 milliseconds.

History

Meitnerium was Darmstadt.
The team bombarded a target of isotope meitnerium-266 was produced:

\, ^{209}_{83}\mathrm{Bi} + \, ^{58}_{26}\mathrm{Fe} \, \to\ \, ^{266}_{109}\mathrm{Mt} + \, ^{1}_{0}\mathrm{n}

The synthesis of this element demonstrated that nuclear fusion techniques could be used to make new, heavy nuclei.

The name meitnerium was suggested in honor of the Austrian physicist and mathematician systematic element name. In 1997, however, the dispute was resolved and the current name was adopted.

 
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