Question

How the drawbacks of Mendeleev periodic table overcome in Modern Periodic Table?

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Answer 1

Explanation:

The isotopes should be given different position due to different weight but should have same position as have same properties. This was a drawback of Mendeleev's table; However as isotopes have same atomic number, they should have same place in table. Thus this drawback was easily overcame.

Answer 2

Answer:

The criteria used by mendeleev in creating the periodic table are atomic mass and chemical properties.

He also concentrated upon the compounds formed by the elements with oxygen and hydrogen.

In modern periodic table, the elements are arranged according to the atomic number.

Hence the problems of isotopes of elements have overcome.

The problem of collision of hydrogen is also settled in modern periodic table.