Question

Limitations of Newlands Law of octaves?

Answer 1

Limitations of Newlands Law of Octaves :

1) The law was only applicable to element calcium.After that the law was not applicable.

2) Newlands thought only 56 elements existed and no other new element will be discovered.But several new elements were discovered that didn't follow the law.

3) Newlands adjusted 2 elements in the same slot.
For example, Cobalt and nickel were put into same slot . They are placed in the column where fluorine, chlorine and bromine are put.But their properties didn't match at all.Iron that matched with the properties of cobalt and nickel was placed far away from them.

Hope This Helps You!

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 ✅✅.

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