Question

Write the advantages of the Modern Periodic Table.

Answer 1

1. The table is based on a more fundamental property i.e., atomic number.
2. It correlates the position of the element with its electronic configuration more clearly.
3. The completion of each peçiod is more logical. In a period, as the atomic number increases, the energy shells are gradually filled up until an inert gas configuration is reached.
4. It is easy to remember and reproduce.
5. Each group is an independent group and the idea of subgroups has been discarded.
6. One position for all isotopes of an element is justified since the isotopes have the same atomic number.
7. The position of the eighth group (in Mendeleev’s table) is also justified in this table. All transition elements have been brought in the middle as the properties of transition elements are intermediate between the left portion and right portion elements of the periodic table.
8. The table completely separates metals from nonmetals. The nonmetals are present in the upper right corners of the periodic table.
9. The positions of certain elements which were earlier misfit (interchanged) in Mendeleev’s periodic table are now justified because it is based on an atomic number of the elements.
10. Justification has been offered for placing lanthanides and actinides at the bottom of the periodic table.