In Mendeleev's periodic table, elements are arranged in increasing order of their atomic number

True

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False

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Solution

The correct option is B False
Classification in Mendeleev's periodic table was based on the atomic mass.
When he arranged elements in order of atomic mass, the properties of elements repeat after a fixed interval.
The chemical properties of elements do not depend on atomic mass.
Hence, he failed to arrange further elements in order of atomic mass.
Therefore, the given statement
“In Mendeleev's periodic table, elements are arranged in increasing order of their atomic number ” is False.

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Similar questions

Question 46
(a) In this ladder (Figure 5.2) symbols of elements are jumbled up. Rearrange these symbols of elements in the increasing order of their atomic number in the Periodic Table.

(b) Arrange them in the order of their group also.

The elements in the periodic table are arranged in the _______ (increasing/decreasing) order of their atomic number.

Which of the following statement (s) about the Modern Periodic Table are incorrect

(i) The elements in the Modern Periodic Table are arranged based on their decreasing atomic number.

(ii) The elements in the Modern Periodic Table are arranged based on their increasing atomic masses.

(iii) Isotopes are placed in an adjoining group (s) in the Periodic Table.

(iv) The elements in the Modern Periodic Table are arranged based on their increasing atomic number.

Q. Read the given statements carefully.
(a) There are total of 7 columns in the Modern periodic table.
(b) Mendeleev arranged the elements in the increasing order of their atomic numbers and according to their chemical properties
(c) Newlands’ law of Octaves worked well with lighter elements only.
The correct statement(s) is/are

The elements are arranged in the decreasing order of their atomic numbers in a periodic table.

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