Question

short note on position of isotopes in mendaleeves and modern periodic table

Answer 1

Position of isotopes in Mendeleev's periodic table.
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As we know,

Isotopes are the atoms having same atomic number and electronic configuration but different atomic masses.

If you come to talk about the position of isotopes in Mentalist periodic table then we will find that.

Based periodic law and isotope is an element which must have a separate places in periodic table.

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But Mendleev's was unable to expect it the places for isotopes in his periodic table.
So,
There was not any place for Isotopes in Mendeleev's periodic table.
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