Question

Which of the following is/are true for modern periodic table?

• A. It is in increasing order of atomic number
• B. Isotopes take the same place as the element
• C. Allotropes take the same place as the element
• D. None of the above

Answer 1

Answer: (A), (B), (C)

Allotropes take the same place as the element

If you observe modern periodic table, it is obvious that elements are arranged in the increasing order of their atomic number.
Carbon, for an example, has many isotopes and many allotropes. But even so, there is only one place for carbon. Thus, the remaining statements are also true.