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8 demerits of medleeves periodic table |
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Answer» 1) He was unable to locate hydrogen in the periodic table. 2)Increase in atomic mass was not regular while moving from one element to another. Hence, the number of elements yet to be DISCOVERED was not predictable. 3)Later on, isotopes of elements were found which violated Mendeleev’s periodic law. 4) Position of hydrogen: Hydrogen is placed in group I. 5) Anomalous pairs: In certain pairs of elements, the increasing order of atomic masses was not obeyed. ... 6) Position of isotopes: Isotopes are the ATOMS of the same element having different atomic masses but same atomic number. Explanation: |
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