Question

what were the limitation of Newlands Law of Octaver ?​

Answer 1

Limitations of Newlands’ Law of Octaves are as follows-

1. Newlands’ Law of Octaves applicable to elements up to Calcium
2. Newland assumed there are 56 elements in the nature and no more elements would be discovered in the future.
3. To fit elements into table Newland put two elements into one slot. Newland introduced unlike elements with different properties into one column.
4. Iron (Fe) was placed away from elements that resembles in properties. Ex: Nickel and cobalt.

Answer 2

→ Law of Octaves only applicable up to calcium and after calcium every 8th did not possess properties similar to that of the first.

→ At the time of Newlands' only 56 elements were existed in nature and Newlands' assume that no more elements will be discovered the future.

→ But, later on , several new elements were discovered, whose properties did not fit into the law of octaves.

→ One important demerit of Newlands' law that he adjusted two elements in the same slot such as Cobalt and nickel [ Co and Ni ] .

→ With the discovery of noble gases the law of octaves become irrelevant.

→ Newlands' law of Octaves worked well with lighter elements only.