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Home » 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 adjoining group (s) in the Periodic Table (iv) The elements in the Modern Periodic Table are arranged based on their increasing atomic number (a) (i) only (b) (i), (ii) and (iii) (c) (i), (ii) and (iv) (d) (iv) only
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 adjoining group (s) in the Periodic Table
(iv) The elements in the Modern Periodic Table are arranged based on their increasing atomic number
(a) (i) only
(b) (i), (ii) and (iii)
(c) (i), (ii) and (iv)
(d) (iv) only
CBSE | Class 10 | NCERT Exemplar | Periodic Classification of Elements | Science
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 adjoining group (s) in the Periodic Table
(iv) The elements in the Modern Periodic Table are arranged based on their increasing atomic number
(a) (i) only
(b) (i), (ii) and (iii)
(c) (i), (ii) and (iv)
(d) (iv) only

Solution:

Answer: (b) (i), (ii) and (iii)

Explanation: Due to the fact that the elements in the Modern Periodic Table are organized according to their increasing atomic number, option I is incorrect. Atomic mass is not a criterion in the contemporary periodic table, which means that option ii) is incorrect. Because all isotopes are assigned the same location in the periodic table, option iii) is incorrect.

i

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