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Features of Mendeleev’s Periodic Table

Mendeleev pla...

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Mendeleev placed isotopes in his periodic table.

A

False

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True

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Q. (a) Why do we classify elements?
(b) What were the two criteria used by Mendeleev in creating his Periodic Table?
(c) Why did Mendeleev leave some gaps in his Periodic Table?
(d) In Mendeleev's Periodic Table, why was there no mention of Noble gases such as Helium, Neon and Argon?
(e) Would you place the two isotopes of chlorine, Cl-35 and Cl-37 in different slots because of their different atomic masses or in the same slot because their chemical properties are the same? Justify your answer.

Q. Mendeleev placed isotopes in his periodic table.

Q. Assertion (A): Mendeleev failed to explain the position of isotopes in his periodic table.
Reason (R) : Isotopes have different atomic mass.

Q. Isotopes were discovered long after Mendeleev had proposed his periodic table.

is position of isotope a limitation or advantage of mendeleeve in his periodic table

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