Question

Mendeleevs periodic law has failed

Answer 1

HEYA!
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✴MENDELEEV'S PERIODIC TABLE✴
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✨It failed due to the following drawbacks :


POSITION OF HYDROGEN : Menddeleev could not explain the position of hydrogen in the periodic table that Turned out a big drawback for it .

POSITION OF ISOTOPES : Mendeleev placed the elements in the order of increasing atomic sizes but atomic sizes didnt vary much from element to element . ISOTOPES have the same atomic number but not the same atomic size . So their placement in the periodic table was a problem .

⚠Another one drawback was that he placed some elements In the wrong order . Like he placed cobalt and nickel in the wrong order that was not in accordance with the increasing atomic mass.


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Answer 2

Hello dear I am Jitu your answer is in down and in photo also
Definition is in photo

the Mendeleev periodic law failed because of the following reason ÷

1) Anomalous pairs
2) position of isotopes
3) grouping of chemically dissimilar elements
4) separation of chemically similar elements
5) electron arrangement
6) position of hydrogen

hello dear so your defination is in photo

If you have any problem than say me

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