Merits and demerits of Mendeleev's periodic table
Answers
Answer:
Merit:-He predicted some undiscoverd elements and leave their space in periodic table.
Demerit:-He can't able to explain that why some elements comes first having large atomic mass than the other small atomic mass elements. His periodic table was totally based on mass no.
Answer:
Explanation:
Merits of Mendeleev Periodic Table
Some gaps were left for the elements yet to be discovered. Thus, if a certain new element is discovered, it can be placed in a new group without disturbing any existing group.
Demerits of Mendeleev Periodic Table
He was unable to locate hydrogen in the periodic table.
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.
Later on, isotopes of elements were found which violated Mendeleev’s periodic law
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