In Mendeleev's periodic table, elements were arranged in the order of their increasing atomic masses and it was also observed that there occurs a periodic recurrence of elements with similar physical and chemical properties.

True

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False

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Solution

The correct option is A True
According to Mendeleev's classification, the properties of elements are the periodic function of their atomic masses and there is a periodic recurrence of elements with similar physical and chemical properties.

Noble gas being inert, could be placed in a separate group without disturbing the original order.

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Similar questions

Q. What physical and chemical properties of elements were used by Mendeleev in creating his periodic table? List two observations which posed a challenge to Mendeleev's Periodic Law.

Q. (a) Explain why:
(i) All the elements of a group have similar chemical properties.
(ii) All the elements of a period have different chemical properties.

(b) The atomic radii of three elements X, Y and Z of a period of the periodic table are 186 pm; 104 pm and 143 pm respectively. Giving a reason, arrange these elements in the increasing order of atomic numbers in the period.

"It was also observed that there occurs a periodic recurrence of elements with similar physical and chemical properties." What does periodic recurrence of elements with similar physical and chemical properties mean?

Q. The elements in the Mendeleev’s periodic table were arranged in the increasing order of their atomic masses. But, the sequence was inverted so that two elements with similar properties could be grouped together. Identify those two elements.

Q. Did Mendeleev intensionly want to arrange elements in the order of increasing a stage atomic masses of when he arranged elements according to their chemical and physical properties,they came in the order of increasing atomic masses?

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