Question

Classification of elements by Newland, Lothar Meyer and Mendeleev’s are based on.....​

Answer 1

This theory was given by a German chemist Dobereiner. According to the theory, If three elements resembling in properties are arranged in an increasing atomic masses, then in each case, the atomic weight of the middle element is found to be the arithmetic mean (average) of the other two extreme elements.

Answer 2

electrons of the atoms

hope it help you mark me BRAINLIEST