What were the limitations of Newlands’ law of octaves?

AcademicChemistryNCERTClass 10

The limitations of Newlands’ law of octaves are given below:
  1. It was not applicable throughout the arrangements. It was only applicable up to calcium. After calcium, every eighth element did not possess properties similar to that of the first element. Thus, this law worked well with lighter elements only.
  2. Newlands assumed that only 56 elements existed in nature and no more elements would be discovered in the future. Those elements discovered after Newland’s octaves did not follow the law of octaves.
  3. The position of cobalt and nickel in the group of elements of different properties could not be explained.
  4. The placing of iron far away from cobalt and nickel, which have similar properties as iron not explained.
raja
Updated on 10-Oct-2022 13:19:15

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