To study the modern periodic table.
Periodic Table: It is the table of chemical elements arranged in order of atomic number such that elements with similar atomic structure appear in the vertical columns.
Modern periodic law: The Modern periodic law states “The chemical and physical properties of elements are a periodic function of their atomic numbers”. Modern periodic table (Figure 1) is based on the modern periodic law.
Figure 2 illustrates the variation of physical and chemical properties of elements along group and periods in the modern periodic table.