What were the limitations

Question.
What were the limitations of Newlands’ Law of Octaves?

solution:

(i) It was not applicable throughout the arrangements. It was applicable up to calcium only.

(ii) Those elements that were discovered after Newlands’ octaves did not find a place in Newlands table.

(iii) The position of cobalt and nickel in the group of the elements containing F and Cl of different properties could not be explained.

(iv) Placing of iron far away from cobalt and nickel, which have similar properties as iron, could also not be explained.

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