Question

what are the limitations of newlands law of octaves?

Answer 1

limitations of newlands law of octaves qre:

1) Newlands assumed that only 56 elements existed in nature and no more elements would be further discovered in the nearer future. But later on several new elements were discovered, whose properties couldn’t be defined as per the Law of Octaves.

2)In order to fit elements into law of octaves Newlands not only adjusted two elements
in the same slot but also adjusted some unlike elements under the same note.

3)Cobalt and nickel are in the same slot and are positioned in the same column with fluorine, chlorine and bromine possessing different properties than these elements.

4)Iron possessing similar properties as cobalt and nickel, is placed far away from these elements.

5) Thus, Newlands’ Law of Octaves can be obeyed well by the lighter elements only.

Answer 2

Hey there !!

$\bf \underline{ \implies Limitations \: of \: Newlands' \: law \: of \: Octaves .}$

→ Law of Octaves only applicable upto 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.


✔✔ Hence, it is solved ✅✅.


THANKS


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