Transfermium Elements

Source:
Nachr. Chem. Tech. Lab. 45 (10), 974 (1997)

The IUPAC has accepted the following new proposals of the Committee on Nomenclature of Inorganic Chemistry (CNIC) for the names and symbols for the transfermium elements:

101   Mendelevium    Md
102   Nobelium       No
103   Lawrencium     Lr
104   Rutherfordium  Rf
105   Dubnium        Db
106   Seaborgium     Sg
107   Bohrium        Bh
108   Hassium        Hs
109   Meitnerium     Mt

History - Previous Suggestions

Source:
Nachr. Chem. Tech. Lab. 42 (11), 1116 (1994);
Pure Appl. Chem. 66, 2419 (1994).

The IUPAC Commission on Nomenclature of Inorganic Chemistry, taking into account the proposals of the Transfermium Workgroup (TWG), has recommended the following names and symbols for the transfermium elements on its session in Balatonfüred (Hungary) on August 31, 1994 (see below, however):

101   Mendelevium    Md
102   Nobelium       No
103   Lawrencium     Lr
104   Dubnium        Db
105   Joliotium      Jl
106   Rutherfordium  Rf
107   Bohrium        Bh
108   Hahnium        Hn
109   Meitnerium     Mt

(This proposal supersedes (?) a previous suggestion: 104 Rutherfordium Rf, 105 Hahnium Ha, 106 Seaborgium Sg, 107 Nielsbohrium Ns, 108 Hassium Hs, 109 Meitnerium Mt.)

See, however, a controversial statement of the discoverers: P. Armbruster, Nachr. Chem. Tech. Lab. 43 (1), 53 (1995); they insist on:

107   Nielsbohrium
108   Hassium
109   Meitnerium

The following preliminary names and symbols have been in use:

104   Unnilquadium   Unq
105   Unnilpentium   Unp
106   Unnilhexium    Unh
107   Unnilseptium   Uns
108   Unniloctium    Uno
109   Unnilennium    Une
110   Ununnilium     Uun
111   Unununium      Uuu

According to WebElements by Mark Winter, names are as follows (May 1997):

104   rutherfordium  Rf
105   dubnium        Db
106   seaborgium     Sg
107   bohrium        Bh
108   hassium        Hs
109   meitnerium     Mt

New elements

Element 110

discovered at GSI Darmstadt, 1994/11/09 16:39 by P. Armbruster, S. Hofmann, G. Münzenberg et al. (Nachr. Chem. Tech. Lab. 42, 1234 (1994); Z. Phys. A, submitted); generated by bombarding a lead target (Pb-208) with accelerated nickel ions (Ni-62, 311 MeV); isotope 269 (159 neutrons), life time 270 microseconds, below platinum in the periodic table.

Element 111

discovered at GSI Darmstadt, 1994/12/18.


Burkhard Kirste, 1995-01-26, 1997-10-14