Meitnerium

The transuranium elements are the elements following uranium in the periodic table. The elements from rutherfordium (Rf, Z = 104) through meitnerium... 

Mt, Z = 109) were formally named in 1997. The transmeitnerium elements, the elements beyond meitnerium (including hypothetical nuclides that have not yet been made) are named systematically, at least until they have been identified and there is international agreement on a permanent name. Their systematic names use the prefixes in Table 17.2, which identify their atomic numbers, with the ending -him. Thus, element 110 was known as ununnilium until it was named darmstadtium (Ds) in 2003. 

Write a nuclear equation for each of the following transformations (a) 25 Rf produced by the bombardment of califomium-245 with carbon-12 nuclei (b) the first synthesis of 266Mt by the bombardment of bismuth-209 with iron-58 nuclei. Given that the first decay of meitnerium is by a emission, what is the daughter nucleus ... 

Francium Radium Lawrendum Rutbofordium Dubnram Seaborgium Bohnum Hassium Meitnerium Darmstadnum Roentgenium ... 

Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium ... 

Francium Radium Actinium Rutherfordiurr Dubnium Seaborgiurr Bohrium Hassium Meitnerium... 

Meisenheimer s rearrangement, 2 466 Meissner diamagnetic current, 23 813 Meissner effect, 23 802—803 Meissner process, 77 163-164 Meitnerium (Mt), 7 492t MEK (methyl ethyl ketone) dehydration, 78 515... 

Controversy about the first synthesis of new chemical elements in the trans-lawrencium region has recently been resolved by a joint lUPAC and lUPAP (International Union of Pure and Applied Physics) committee. CNIC has assigned names that appear to have been internationally accepted for these elements. Although I have relied on the lUPAC/IUPAP document to discuss elements up to Meitnerium, for elements above Z = 109, the analysis provided is strictly my own due to my reading and interpretation of the scientific literature. 

Meitnerium - the atomic number is 109 and the chemical symbol is Mt. The name derives from the Austrian physicist Lise Meitner , who had discovered the element, protactinium. The first synthesis of the element Meitnerium is credited to German physicists from the GSI (Center for Heavy-Ion Research) lab at Darmstadt, Germany under Gunther Miinzenberg, in 1982 using the nuclear reaction ° Bi ( Fe, n) Mt. The longest half-life associated with this unstable element is 0.07 second Mt. 

ISOTOPES There are five isotopes of unnilennium (meitnerium), ranging from Une-266 to Une-276, and with half-lives ranging from 1.7 milliseconds to 0.72 seconds. 

The most stable isotope of unnilennium is meitnerium-276, which has a half-life of about 0.72 seconds. Une-276 decays into element 107 (Uns-272 or bohrium-272). 

There are too few atoms of meitnerium produced at any one time to form compounds. 

The Heavy Ion Reaction Separator (SHIP) located in the GSI laboratory in Germany was used to identify elements 107 (bohrium) through element 109 (meitnerium) during the years 1981 through 1984, and it was used again later, between 1994 and 1996, to verify elements 110 (Uun) through element 112 (Uub). 

Meitnerium (Unnilennium) Mt or Une 1982 (Darmstadt, Germany) Peter Armbruster and Gottfried Munzenberg (both German) 349... 

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