Question

how does modern periodic law differs from mendleev periodic law? explain any two defects of mendleevs periodic table which were overcome in the modern periodic table ​

Answer 1

Answer:

Explanation:

The major difference is that the elements in Mendeleev's periodic table were arranged by atomic mass and the modern periodic table arranges elements by atomic number.

1 position of hydrogen was not confirmed

2 element with a slightly higher atomic mass was placed before an element of lower atomic mass.

These defects were overcome in the modern periodic table

Answer 2

Answer:

As per Mendeleev's Periodic Law, the physical and chemical properties of the elements are a periodic function of their atomic weight. Modern Periodic Law the physical and chemical properties of the elements are a periodic function of their atomic number.

Defects

• position of hydrogen was not confirmed
• element with a slightly higher atomic mass was placed before an element of lower atomic mass.
• it doesn't explain the electronic arrangement of elements.

These defects were overcome in the modern periodic table

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