Question

How newlands arrange __ the then known elements to table of octaves?

Answer 1

Newland arranged the then known elements in the increasing order of ATOMIC MASSES.

He observed that every 8th element has properties similar to the 1st one just as the 8th note resembles the 1st in an octave of music .

Ex: Li   Be   B   C   N   O   F

    Na   Mg  Al  Si  P    S    Cl

It means Li & Na have similar properties and the difference between them is seven.