From Academic Kids
|Name, Symbol, Number||meitnerium, 109, Mt|
|Chemical series||Transition metals|
|Group, Period, Block||9, 7, d|
|Atomic weight|| amu|
|Electron configuration||probably [Rn] 5f14 6d7 7s2|
|e- 's per energy level||2, 8, 18, 32, 32, 15, 2|
|State of matter||Presumably a solid|
Meitnerium (Eka-Iridium) is a chemical element in the periodic table that has the symbol Mt and atomic number 109. It is a synthetic element whose most stable isotope is Mt-266 with a half-life of 3.4 ms.
Meitnerium was first synthesized on August 29, 1982 by a German research team led by Peter Armbruster and Gottfried M?erg at the Institute for Heavy Ion Research at Darmstadt.
The team did this by bombarding a target of bismuth-209 with accelerated nuclei of iron-58. The creation 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-Swedish physicist and mathematician Lise Meitner, but there was an element naming controversy as to what the elements from 101 to 109 were to be called; thus IUPAC adopted unnilennium (symbol Une) as a temporary, systematic element name. However in 1997 they resolved the dispute and adopted the current name.