State two achievements of Newlands' law of octave.
Answers
The law states that: If the elements are arranged in order of their equivalents [relative atomic masses] with a few transpositions, it will be seen that elements belonging to the same groups appear in the same horizontal line. Also the numbers of similar elements differ by seven or multiples of seven
Newlands recognized that with every seven elements, the 8th seemed to be very similar to the 1st of the previous seven. He was one of the first scientists to develop a “Periodic Table” from the available atomic weights. Newlands claims to be the first to recognize the “Periodic Law”. He also recognized that the “groups” had more than 3 elements (not just “triads”), and he combined both metals and non-metals in the same group. Aside from that, there are noticeable similarities between the arrangement made be Newlands and the modern periodic table.