Question

b) Write any two merits of Mendeleef's periodic table.​

Answer 1

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Merits are as follows:-

 1. There was a regular gradation in physical and chemical properties of elements.

 2. The group number of an element indicates highest oxidation state that it can attain.

 3. There were many vacant spaces in Mendeleev's periodic table for the elements to be discovered. He  named them Eka-Boron, Eka-Aluminium and Eka-silicone He also predicted the properties of these  undiscovered elements including atomic masses. These elements were discovered as Sc ,Ga and Ge  with same features as he predicted.

 4. Mendeleev’s arrangement helped to correct atomic masses of a number of elements.

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Answer 2

Answer:

Explanation:

Following were the merits of mendeleev's periodic table:

1. There was a regular gradation in physical and chemical properties of elements.

 2. The group number of an element indicates highest oxidation state that it can attain.

 3. There were many vacant spaces in Mendeleev's periodic table for the elements to be discovered. He  named them Eka-Boron, Eka-Aluminium and Eka-silicone He also predicted the properties of these  undiscovered elements including atomic masses. These elements were discovered as Sc ,Ga and Ge  with same features as he predicted.

 4. Mendeleev’s arrangement helped to correct atomic masses of a number of elements.

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