From the above tables, it is comprehended that Sodium and caesium belong to a similar group, which is collaboratively termed as “alkali metal group”. The outer electron structure of both the elements is the same, which resulted in similar chemical and physical properties. Differences shown in the table are basic in terms of atomic number, weight, structure and configuration.
The reaction of caesium with oxygen, water and fluorine is described which reflects that reaction with oxygen is time-consuming and is not rapid whereas fluorine is explosive. Characteristics or features of oxides of 2nd group elements are less basic as compared to the first group due to the formation of white ions. Similarities between caesium and sodium are more in comparison to the differences as they belong to the same group and same block in the periodic table. Hence, the physical and chemical properties of both the oxides are structured similarly.