Meitnerium [Mt] (CAS-ID: 54038-01-6) locate me
An: 109 N: 159 Am: [268]
Group No: 9 Group Name: (none)
Block: d-block Period: 7
State: presumably a solid at 298 K
Colour: unknown, but probably metallic and silvery white or grey in appearance Classification: Metallic
Boiling Point: unknown (?)
Melting Point: unknown (?)
Density: unknown
Shell Structure diagrams | Atomic Radius diagram
Isotopes

Discovery Information
Who: Physicists at the Heavy Ion Research Laboratory
When: 1982
Where: Darmstadt, West Germany
Name Origin
Named after Lise Meitner, a Swedish physicist who helped discover protactinium and first split the nucleus of uranium, creating what her team dubbed "fission".
Sources
First synthetically produced by bombarding Bi209 with accelerated nuclei of Fe58.
Uses
None.
Notes
In August of 1997 the International Union of Pure and Applied Chemistry announced the official naming of this element as Meitnerium.
Element 109 was previously known as Unnilennium; from the latin for "one zero nine".