Prediction of Characteristics of elements based on another in the same family
Families are the vertical rows of elements. Each family has the same number of valence electrons which will lead to similar characteristics. Prediction of the characteristics and properties of an element is possible if you know the properties of other elements in the same family.
Example:
A property in the Alkali Metals family is that its elements are highly reactive. Cesium is present in this family so we can predict that it is reactive as well.
Example:
A property in the Alkali Metals family is that its elements are highly reactive. Cesium is present in this family so we can predict that it is reactive as well.