Question

explain the limitations of medeleevs periodic table​

Answer 1

Explanation:

LIMITATIONS OF Mendeleev's Periodic Table :

• Position of Hydrogen => Position of hydrogen in the perodic table is Uncertain , Because hydrogen is placed in 1 A group with Alkali metals .
• Position of isotopes => isotopes haven't been given separate place in perodic table .
• Cause of periodicity => Mendeleev could not explain the cause of periodicity .
• Separation of similar elements => Some dissimilar elements have been placed together.

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Answer 2

Explanation:

LIMITATIONS in Mendeleevs's Periodic Table

- Anomalous pairs of elements:-

certain pairs of elements having high atomic weights have been given positions before the elements having lower atomic weights

this defect appears if elements were arranged according to their-atomic numbers.

examples -Co( atomic weight 58.9, atomic number 27)

-position of rare earth and astinides:-

could be justified only if arranged according to their- atomic numbers

-position of isotopes:-

isotopes have to be balanced and same position according to-atomic numbers