Question

Write down two drewback of Newlands law of octaves

Answer 1

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▶ Newlands' law of Octaves :-

$\longrightarrow$ Newland found that every eighth element had properties similar to that of the first. He compared these to the octaves found in music. Therefore, he called it is the ‘ Law of Octaves’. It is known as ‘ Newlands'law of octaves ’ .

⟹Limitations of Newlands

law of Octaves.

$\longrightarrow$ Law of Octaves only applicable upto calcium and after calcium every 8th did not possess properties similar to that of the first.

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

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

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

$\longrightarrow$ With the discovery of noble gases the law of octaves become irrelevant.

$\longrightarrow$ Newlands'law of Octaves worked well with lighter elements only.

✔✔ Hence, it is solved ✅✅.

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