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NCERT Solutions for Class 10th Ch 5 Periodic Classification of Elements Science Accent Hisar Suraj sir Page No: 81 1. Did Dobereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out. Answer Yes, Dobereiner’s triads also exist in the columns of Newlands’ Octaves. One such column is Li, K, Na. 2. […]

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