Did DobereinerA's triads also exist in the colurrxrts of Ne lord's Octaves? Compare and find out.
Yes, Dobereiners triads also exist in the columns of Newlands' Octaves. Dobereiner stated in his law of triads that the arithmetic mean of the atomic masses of the first and third element in a triad would be approximately equal to the atomic mass of the second element in that triad. He observed that groups of three elements (triads) could be formed in which all the elements shared similar physical and chemical properties. The law of octaves states that every eighth element has similar properties when the elements are arranged in the increasing order of their atomic masses. Example: Consider the elements lithium (Li), sodium (Na), and potassium (K) which are present in the second column of Newlands' classification of elements. Now, if we start with lithium as the 1st element, then the 8th element from it is sodium, and according to Newlands' law of octaves, the properties of the 8th element, sodium should be similar to those of the 1st element, lithium. Again, if we take sodium as the 1st element, then the 8th element from it is potassium, and according to Newlands' law of octaves, the properties of the 8th element, potassium should be similar to those of the 1st element, sodium. This means that according to Newlands' law of octaves, the elements lithium, sodium, and potassium should have similar chemical properties. We also know that lithium, sodium, and potassium form a Dobereiner's triad having similar chemical properties. From this, we conclude that Dobereiners triads also exist in the columns of Newlands Octaves.
