what are the limitations for Newland...

what are the limitations for Newlands' law of octaves ?

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1) There are instances of two elements filtted into the same slot .Ex :Co and Ni
2) Certain elements totally disslimilar in their properties were fitted into the same group .
3) The law was not valid for elements that had atomic masses higher than calcuium .
4) It was restricted to 56 elements and did not leave any room for new elements .
5) After the discovery of NOble gases , this classification has no important since the properties of the eighth element are no longer similar to the first element .

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what are the limitations for Newlands' law of octaves ?

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