Advantages of the Modern periodic table (long form of periodic table) - The table is based on atomic numbers of elements. This is a more fundamental quantity than the atomic mass concept used earlier. (The confusion regarding atomic mass was that scientists did not know if they should consider atomic mass or molecular mass of elements such as H or O).
- The table shows why elements in the same group display same properties. The table also shows how and why the properties of elements differ in the same period.
- The periodicity is related to electron configuration. This is displayed very clearly by the periodic table. All chemical and physical properties are a manifestation of the electron configuration of the elements. Hence the periodic table is very systematic and follows the fundamental electronic structure of the elements to classify them.
The periodic table was modified in the middle of the 20th century. The current periodic table in use is shown below. |
