Newlands stated that there was a periodic similarity in properties of every eighth element in his system. However, today we see that for periods 2 and 3. the similarity occurs in every ninth element. What is the reason? Explain.

Due to incomplete periodic table the Newlands theory of octaves was rejected.

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Explanation:

Newlands published his periodic table in 1864. He was a British analytical chemist.

His table was quite incomplete. He based the table on the so called "law of octaves" which states that the properties of elements are similar after each eight element.

This was possible because the noble gases were not yet discovered. After the discovery of the noble gases, similar properties of elements can only occur after every ninth element.

yes it is balanced

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