Question

why is periodic classification of elements necessary

Answer 1

to study the systematics arrangement of elements without this it is impossible to study about so mch element with their different different properities

Answer 2

Before all the naturally-occurring elements were discovered, the periodic table was used to predict the chemical and physical properties of elements in the gaps on the table....The table is useful for modern students and scientists because it helps predict the types of chemical reactions that are likely for an element.