Question

What was the basis of earlier attempt made for classification and grouping of elements?

Answer 1

The first attempt made by Dobernier in 1817 to classify elements into a group of 3 was on the basis of their properties. Newlands later on found that every 8th element has properties similar to the first one and called them newland's octaves.
Mendeleev however followed a different approach and classified elements on the basis of atomic mass & properties both.

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Answer 2

Answer:

Basis of earliest attempts made for classification and grouping of elements is based on malleability, ductility and density and also to consider whether they are metals and nonmetals.