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Classification of Elements and Periodicity in Properties
In 1997, IUPAC recommended the approved official names for elements with atomic numbers 104 to 109. The names for elements with atomic number 110 and beyond have yet to be officially announced. This nomenclature is based on the Latin words for the atomic number of the element.
(i) The names are derived directly from the atomic number using the numerical roots for 0 and numbers 1to 9.
| Digit | Name | Abbreviation |
| 0 | nil | n |
| 1 | un | u |
| 2 | bi | b |
| 3 | tri | t |
| 4 | qued | q |
| 5 | pent | p |
| 6 | hex | h |
| 7 | sept | s |
| 8 | oct | o |
| 9 | enn | e |
(ii) The roots are strung together in the order of digits which make up the atomic number and “ium” is added at the end.
For example let us write the IUPAC name and symbol for the elements having atomic number 112. The roots for 1, 1, 2 are un, un and bi respectively. Hence the name and the symbol respectively are ununbium and Hub.
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Which property is the basis of long form of periodic table?
How many elements are placed in each period of the p-block?
What is the number of groups in: (i) p-block (ii) d-block?
How many elements are present in:
(i) second period
(ii) fourth period
(iii) sixth period?
What is the name given to the s-block elements?
To which block the element with outer electronic configuration 4s23d10 belongs?
Why are there 10 elements in each series of d-block?
In terms of electronic configuration,
what is common in a given period and group?
Give the general electronic configuration of
(i) Transition elements (ii) Inner transition elements.
Name the group and period to which an element with Z = 15 belongs ?
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