Chemistry · Modern periodic law and present form of the periodic table
Which of the following statement(s) about the Modern periodic table is/are incor
Which of the following statement(s) about the Modern periodic table is/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 number (iii) Isotopes are placed in an adjoining group(s) in the periodic table.
- A. (i) only
- B. (i) and (ii)
- C. (ii) and (iii)
- D. (i) and (iii)
Step-by-step solution
In the Modern periodic table, elements are arranged in order of increasing atomic number, so statement (i) is incorrect. Isotopes have the same atomic number and occupy the same position, not adjoining groups, so statement (iii) is incorrect. Thus, both (i) and (iii) are incorrect.
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