Which of the following statements are not related to either Mendeleev's or Modern periodic tables?

(a) The position of hydrogen is not justified.
(b) Elements like Co and Ni were placed in the column where halogens were present.
(c) Classification of elements could hold good only up to atomic weight 40.
(d) Two sets of 14 elements were each placed outside the main body of the periodic table.

b and c

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a and d

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b and d

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a and c

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Solution

The correct option is A b and c

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Similar questions

Q. Which group elements of modern periodic table were placed along with alkali metals in Mendeleev table?

Q. Select the correct alternative from the statements that are not related to Mendeleev's periodic table.

(a) The physical and chemical properties of elements are the periodic function of their atomic number.

(b) The elements with higher atomic weight were placed before elements with lower atomic weights.

(d) The atomic number has been established as the fundamental characteristic of elements based on the work on x-ray spectra of elements.

Q. (a) How were the positions of isotopes of an element decided in the modern periodic table?
(b) How were the positions of cobalt and nickel resolved in the modern periodic table?
(c) where should hydrogen be placed in the modern periodic table? Give reason for your answer.

Q. For the periodic classification of elements, a number of laws and classification systems based on different parameters were followed. Which of the following is not based on the atomic weights of elements?

Question 4
Which of the following statement(s) about the Modern Periodic Table are incorrect?

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

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

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

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

(a) (i) only
(b) (i), (ii) and (iii)
(c) (i), (ii) and (iv)
(d) (iv) only

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