Did Dobereiner's triads also exist in the columns of Newlands' octaves

1.	Did Dobereiner's triads also exist in the columns of Newlands' octaves ? Compare and find out.
Answer» Solution :Dobereiner.s triads also exist in the columns of NEWLANDS. octaves. Lithium, sodium and potassium forms a Dobereiner.s triad. Lithium, the first element of this triad is considered as the first element as Newlands. octave, then the eighth element from it is sodium. These elements possesses similar PROPERTIES ACCORDING to the law of triads and the law of octaves. Similarly, if sodium is considered as the first element then the eighth element from it is potassium. Moreover, sodium and potassium possess similar properties according to both the laws. Apart from these, some other elements BERYLLIUM (Be), magnesium (Mg) and calcium (Ca) obeys law of triads and the law of octaves. THUS, Dobereiner.s triads also exist in the columns of Newlands. octaves.

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