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Chapter: 11th 12th std standard Class Organic Inorganic Physical Chemistry Higher secondary school College Notes

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IUPAC Nomenclature for Elements with Z greater than 100

The elements beyond uranium (Z = 92) are all synthetic elements and are known as transuranium elements. The elements beyond fermium are known as transfermium elements. These elements fermium (Z = 100), mendelevium (Z = 101), nobelium (Z = 102) and lawrencium (Z = 103) are named after the names of famous scientists. Although names and symbols to many of these elements have been assigned by these are still not universally accepted.

IUPAC Nomenclature for Elements with Z > 100

 

The elements beyond uranium (Z = 92) are all synthetic elements and are known as transuranium elements. The elements beyond fermium are known as transfermium elements. These elements fermium (Z = 100), mendelevium (Z = 101), nobelium (Z = 102) and lawrencium (Z = 103) are named after the names of famous scientists. Although names and symbols to many of these elements have been assigned by these are still not universally accepted. Also some of these elements have been assigned two names/symbols. For example, element with atomic number 104 is called either Kurchatovium (Ku) or Rutherfordium (Rf) while element with atomic number 107 is called Neilsbohrium (Ns) or Borium (Bh). But the following elements have been assigned only one official name. For example element with atomic number 105 is called Dubnium, with atomic number 106 as Seaborgium, with atomic number 108 as Hassnium and with atomic number 109 is named as Meiternium. To overcome all these difficulties, IUPAC nomenclature has been recommended for all the elements with Z > 100. It was decided by IUPAC that the names of elements beyond atomic number 100 should use Latin words for their numbers. The names of these elements are derived from their numerical roots.

 

Numerical ->    0        1        2        3        4        5        6        7        8        9

roots      nil      un      bi       tri      quad  pent   hex    sept   oct     en

 

Atomic   Name of the          Symbol

number   element      

              

101         Unnilunnium        Unu

102         Unnilbium  Unb

103         Unniltrium  Unt

104         Unnilquadium      Unq

105         Unnilpentium       Unp

106         Unnilhexium        Unh

107         Unnilseptium       Uns

108         Unniloctium         Uno

109         Unnilennium        Une

110         Ununnilium Uun

111         Unununium Uuu

112         Ununbium  Uub

113         Ununtrium  Uut

114         Ununquadium      Uuq

115         Ununpentium       Uup

116         Ununhexium        Uuh

117         Ununseptium       Uus

118         Ununoctium         Uuo

119         Ununennium        Uue

120         Unbinilium Ubn

 

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