Wednesday, April 24, 2013

Nomenclature of elements with atomic number > 100

Introduction :
In the periodic table the elements are arranged in the order of the atomic number.  Atomic number is nothing but it is the number of proton or number of electron in the neutral atom. It is denoted by the letter Z.

The modern periodic law states that “ the physical and chemical properties of the elements are periodic function of their atomic numbers.”
Periods constitutes a series of elements whose atoms have the same number of  electron shell i.e., principal quantum number (n). There are seven periods and each period starts with a different principal quantum number.

Transuranium elements are elements beyond uranium (Z=92) they all synthethic elements.   Element with atomic number 100 is called as Fermium and the elements beyond these element in the periodic table is called as transfermium element.  The element after atomic number 100 is normally named as famous scientist.  But there is a lot of ambiguity in the names.  In each country the name will differ.  Some of the elements will be having more than one names

For example Kurchatovium with atomic number 104 is also called as Rutherfordium
Neilsbohrium also known as Borium has atomic number of 107.

The discovererc of these elements normally decide the name of the element.  Since same element can be made in the laboratory by more htan one scientist more than one name existed

Some other common names or nomenclature of elements with atomic number > 100 are given as

Atomic NumberName
Z = 105Dubnium
Z = 106Seaborgium
Z = 108Hassnium
Z = 109Meiternium

IUPAC nomeclature of elements with atomic number > 100

To over come this ambiguity International Union of Pure and Applied Science (IUPAC) has recommended a nomeclature for elements with atomic number greater than 100.
IUPAC has given the name using the Latin words for their numbers.  The root words for the names is given in the table

NumericalRoot Name
0nil
1un
2bi
3tri
4quad
5pent
6hex
7sept
8oct
9en

Name (Nomenclature) of some of the elements with atomic number > 100

Atomic
number
Name of the
element
Symbol
Z = 101UnnilunniumUnu
Z = 102UnnilbiumUnb
Z = 103UnniltriumUnt
Z = 104UnnilquadiumUnq
Z = 105UnnilpentiumUnp
Z = 106UnnilhexiumUnh
Z = 107UnnilseptiumUns
Z = 108UnniloctiumUno
Z = 109UnnilenniumUne
Z = 110UnunniliumUun
Z = 111UnununiumUuu
Z = 112UnunbiumUub
Z = 113UnuntriumUut
Z = 114UnunquadiumUuq
Z = 115UnunpentiumUup
Z = 116UnunhexiumUuh
Z = 117UnunseptiumUus
Z = 118UnunoctiumUuo
Z = 119UnunenniumUue
Z = 120UnbiniliumUbn

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