Question

write a short note on position of isotopes in the Mendeleev's and the modern periodic table​

Answer 1

Answer:

Isotopes: Isotopes are atoms having the same atomic number but different atomic masses. Therefore, according to Mendeleev's classification, these should be placed at different places depending upon their atomic masses. For example, hydrogen isotopes with atomic masses 1,2, and 3 should be placed at three places.

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Explanation:

Answer 2

Answer:

Isotopes have the same atomic number, similar chemical properties but different atomic masses. Based on the periodic law, an isotope is an element, which must have a separate place in the periodic table. However, there are no places for isotopes in his periodic table.

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