Question

Give three advantages and disadvantages of mandeleev periodic table​

Answer 1

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Explanation:

Advantages and disadvantages of mendeleev's periodic table

• Grouping of elements. He generalized the study of the elements then known to a study of mere 8 groups.
• Gaps for undiscovered elements. Mendeleev left some gaps in his periodic table.
• Prediction of properties of undiscovered elements.
• Incorrect masses corrected.

Answer 2

Answer:

Advantages-

• Elements which are similar with respect to their chemical properties are grouped together
• Elements in the same group had the same valency and similar chemical properties
• Based on periodicity of properties a number of gaps were left in the table

Disadvanages-

• Position of rare earths and actinides could not be justified
• Position of isotopes could not be justified
• Certain pair of elements having higher atomic weights are placed before elements having lower atomic weights