Question

what are the achievements of mendeleevs periodic table.....?????​

Answer 1

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Achievements of Mendeleev's Periodic Table

• Systematic study of the elements.
• Prediction of new elements and their properties.
• Correction of doubtful atomic masses.
• Position of hydrogen.
• Anomalous positions of some elements.
• Position of isotopes.
• No co-relation of elements in sub-groups.
• Different groups for similar elements.

Answer 2

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• It was the first table in systematic order.

• Gaps were left for some unknown elements.

• He left some column for noble gases.

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