Question

give a reason why elements need to be properly clasdified

Answer 1

so that it become easy classify they our classified in mettalic nonmettalic alkali etc

Answer 2

There are nearly 114 elements r known n we need to study them all
But it is impossible to remember all the physical and chemical properties of each n every element so we need to classify them on the basis of some similar characteristics so that if we study 1 element we would be able to understand the properties if otherstoo