Question

dobereiner periodic table advantage and limitation​

Answer 1

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Answer 2

Advantages and Limitation of Dobereiner:

Advantages:

• He provided a way in which in could group elements of the periodic table
• He was able to group 3 elements based on their similar properties and the atomic mass of middle element is equal to average of the other two elements. In this way, he could find an atomic number of some of the elements.

Disadvantages:

• With more and more elements getting discovered, he was unable to group them in triads.
• He could not provide the basis of prediction of a new element
• Nitrogen phosphorus and arsenic had similar properties and chemical nature but the mean of atomic masses of nitrogen and arsenic was not equal to that of phosphorus.