Nobelium: Béda antara owahan

'''Nobelium''' ({{pronEng|noʊˈbiːliəm,noʊˈbɛliə}}) kuwiiku sawijining [[èlemèn sintètis]] kanthi simbul '''No''' lan [[nomer atom]] 102.

Some sources quote a melting point of 827oC for nobelium but this cannot be substantiated from an official source and seems implausible regarding the requirements of such a measurement.However, the 1^st, 2^nd and 3^rd ionization energies have been measured. In addition, an electronegativity value of 1.3 is also sometimes quoted. This is most definitely only an estimate since a true value can only be determined using a chemical compound of the element and no such compounds exist for nobelium.

Seventeen [[radioisotope]]s of nobelium have been characterized, with the most stable being ²⁵⁹No with a [[half-life]] of 58 minutes. Longer [[half-lives]] are expected for the as-yet-unknown ²⁶¹No and ²⁶³No. An isomeric level has been found in ²⁵³No and K-isomers have been found in ²⁵⁰No, ²⁵²No and ²⁵⁴No to date.

This cold fusion reaction was first studied in 1979 at the FLNR. Further work in 1988 at the GSI measured EC and SF branchings in ²⁵⁴No. In 1989, the FLNR used the reaction to measure SF decay characteristics for the two isomers of ²⁵⁴No. The measurement of the 2n excitation function was reported in 2001 by Yuri Oganessian at the FLNR.