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Limitations of Mendeleèv's Classification |
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Answer» No fixed position could be assigned to hydrogen in the Periodic Table. Isotopes discovered long after Mendeléev periodic classification ofelements imparted a challenge to Mendeleev’s Periodic Law. The atomic masses of elements did not increase in a steady manner while going from one element to other which made it difficult to predict the number of elements that could be discovered between two elements. |
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