Question

(3) Position of isotopes in the Mendeleev's and the
Modern Periodic table.​

Answer 1

Answer:

Mendeleev - having not.

Modern periodic table - same atomic no.

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Answer 2

Answer:

isotopes are given seperate spaces in Mendeleeve's table while placed along with their element in modern table

Explanation:

Mendeleeve's table:periodic function of atomic mass

modern table: periodic function of atomic numbers