Question

holla ❤️❤️❤️ limitations of Mendeleev's periodic table?

Answer 1

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♦ 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

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Following are the limitations of Mendeleev's periodic table:

»» Anomalous position of hydrogen :


Hydrogen has one electron in its only sale alkali metals also have only one electron in their respective outermost shells. Therefore, many properties of Hydrogen are similar to those of alkali metals. For example, like alkali metals, hydrogen combines with halogens, oxygen and sulphur to form compounds having similar formula. Position of hydrogen in the periodic table is controversial that is no face position can be assigned to hydrogen in the periodic table.


»» position of isotopes:

Isotopes were discovered long after Mandlik gave his predictable isotopes are the atoms of the same element having similar chemical properties but different atomic masses point in other words, isotopes of all elements pose to to a challenge to mentally periodic law.


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