Question

[TBQ.IV.(1)]
Newlands’ periodic table is based on atomic masses of elements and modern periodic table is based on the atomic number of elements.

Answer 1

Newlands’ Law of Octaves

In 1866, John Newlands arranged 56 known elements in the increasing order of their atomic mass. He observed that every eighth element had properties similar to those of the first element like the eighth note in an octave of music is similar to the frst. This arrangement was known as 'law of octaves'.

Modern Periodic Law
The modern periodic law states : “The chemical and physical properties of the elements are the periodic functions of their atomic numbers”.

So the given statement is correct.