Question

why was position of isotopes of an element like oxygen, sodium in the Mendeleev's periodic table not considered appropriate?
give only right answer otherwise your answer will reported ​

Answer 1

Answer:

why was position of isotopes of an element like oxygen, sodium in the Mendeleev's periodic table not considered appropriate?

give only right answer otherwise your answer will reported ​

Explanation:

Answer 2

Answer:

The isotopes were discovered long after Mendeleev had proposed his periodic classification of elements. ... Thus, ISOTOPES should be placed separately in the periodic table but no separate place has been given to the isotopes in the Mendeleev periodic table.

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