After failure of Dobereiner’s triads, newland’s octaves
classification was done.
56 elements were discovered.
Elements are arranged in an increasing order of their atomic
masses.
Every eight element had similar property with first.
They compared with octaves which are found in music.
Therefore, this classification is known as “Newland’s Octaves”.
STATEMENT OF LAW:- It states that, when the elements are
arranged in an increasing order of their atomic masses, the
properties of the eighth element are similar to the first.
FEATURES OF NEWLAND’S RULE:-
From 56 elements, they can be arrange only up to calcium.
After calcium, every eighth element did not possess
properties similar to that of the first.
Only 56 elements were known but later several elements
were known.
It not includes inert gases because they were not discovered.