Question

position of isotopes in the mendeleevs periodic table

Answer 1

✔️ Position of isotopes in the mendeleev's and the modern Periodic table -


Isotopes were discovered long time after Mendeleev put forth the periodic table.

A challenge was posed in placing isotopes in Mendeleev's periodic table,as isotopes have same chemical properties but different atomic masses.

Later , the isotopes of Cl 17 - 35 and Cl 17 - 37 were placed in the same group as both have the same atomic numbers.

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